If a game uses a Transmission Control Protocol (TCP), there will be increased latency between players. The healthy ecosystem that good netcode creates around a game benefits everyone. While local play always ensures that all player inputs arrive and are processed at the same time, networks are constantly unstable in ways the game cannot control or predict. [11], Latency is unavoidable in online games, and the quality of the player's experience is strictly tied to this (the more latency there is between players, the greater the feeling that the game is not responsive to their inputs). Plus, lost or delayed information happens regularly even on the best networks, and poor netcode can actively hamper matches no matter how smooth the conditions may be. Arc System Works has launched the highly-anticipated GGPO rollback netcode update for Guilty Gear XX Accent Core Plus R on PC (via Steam). There are relatively few easy-to-follow explanations for what exactly rollback netcode is, how it works, and why it is so good at hiding the effects of bad connections (though there are some). This game features a unique mechanic called the Tactical Offense Position (aka T.O.P.) © 2021 Condé Nast. Netherrealm Studios has already been recorded saying that a typical implementation takes about 4-12 engineers for 9 months, and keep 6 just to upkeep it. Arc System Works America, Inc. is pleased to announce that Guilty Gear XX Accent Core Plus R, now featuring GGPO rollback netcode, has exited beta testing and will officially release today, December 22nd, exclusively on Steam (PC)!. What is Rollback Netcode? This type of protocol also tends to respond very slowly whenever they lose a packet, or when packets arrive in an incorrect order or duplicated, which can be very detrimental to a real-time online game (this protocol was not designed for this type of software). A single update of a game simulation is known as a tick. Playing offline is great, and it will always have considerable value in fighting games, but it’s simply the reality that a large percentage of the player base will never play offline. Unlike a local game where the inputs of all players are executed instantly in the same simulation or instance of the game, in an online game there are several parallel simulations (one for each player) where the inputs from their respective players are received instantly, while the inputs for the same frame from other players arrive with a certain delay (greater or lesser depending on the physical distance between the players, the quality and speed of the players' network connections, etc.). [1][2] Netcode as a term tends to be used only in the gaming community, as it is not recognized as an actual computer science term.[3][4]. This game had their netcode revamped to roll back after launch to create a smoother experience. Netcode is a blanket term most commonly used by gamers for anything that somehow relates to networking in online games, often referring to synchronization issues between clients and servers. It also predicts what input the other player is most likely to make in the coming frames, allowing for a smooth experience on the host's part until their opponent's correct input causes a rollback. This match, played online between two Japanese players, impacted who gets to attend the Capcom Pro Tour finals. There will be more active players, more chances to consume content for your favorite game—from tech videos to spectating online tournaments to expanding the strategy of lesser-used characters—and more excitement surrounding your game in the fighting game community (FGC). Rather than waiting for input to be received from other players before simulating the next frame, GGPO predicts the inputs they will send and simulates the next frame without delay using that assumption. It's an alternative to the old way of doing that — freeze the game until everyone's inputs register, each and every frame. Good online play is possible, though, and nothing is more important for realizing this goal than choosing the right approach to netcode. GGPO uses a netcode technique called “rollback”. Adding meme rollback netcode will not result in more sales, to them it's literally money thrown out the window. It's just not gonna happen OP, no matter how much one petitions or complains. There's no excuse for not supporting crossplay (give players the option to turn it off if they want to for whatever reason), and of course rollback netcode. is based on a rollback netcode. When the inputs are received, the state of the game is rolled back to the correct state if any input didn't match the prediction. Online play in games is nothing new, but fighting games have their own set of unique challenges. Rollback netcode is essential for fighting games as your inputs are registered the moment you hit a button – this means you’ll always get the command you wanted, even in matches with high pings. The new network options also comes with its own client/server structure … Why is it so good? Players usually make claims about "bad netcodes" when they encounter connection problems in a game, although the causes of these problems could be completely out of their engine's control (some common causes: high latency between server and client, packet loss, network congestion, etc.). Ricky Pusch - Oct 18, 2019 3:07 pm UTC. Both companies and players should care about good netcode because playing online is no longer the future—it's the present. Enlarge. Part 1: Introduction Part 2: Topology Part 3: Lockstep and Rollback. Despite Killer Instinct’s pedigree as an excellent game, there’s no doubt that its superb rollback netcode has played a huge part in the sustained growth of its community. Conversely, rollback netcode does things differently; it logs when inputs are received and adjusts (or 'rolls back') each player's simultaneous game state to match. Back in October of this year, Arc System Works began an online beta test to implement rollback netcode into Guilty Gear XX Accent Core Plus R on PC. With rollback netcode, if the game has not yet received needed inputs from the network, the game will continue on a temporary guessed input. Both combined would make it so easy to find matches in every game. With the inclusion of GGPO, players can enjoy online matches against others just about anywhere in the world with virtually no input delay. Windjammers 2 is delayed until 2021 so developers can add rollback netcode. These types of connections are very reliable, stable, ordered and easy to implement, and are used in virtually any operation we do on the Internet (from web browsing to emailing or chatting through an IRC). When the latency between players is so high that the remote player's input cannot be sent into a buffer of, say, 3 frames (48 ms), the game must wait, causing the screens to "freeze" (a delay-based netcode does not allow the simulation to continue until it receives the inputs from all the players in the frame in question). Unlike a local game where the inputs of all players are executed instantly in the same simulation or instance of the game, in an online game there are several parallel simulations (one for each player) where the inputs from their respective players are received instantly, while the inputs for the same frame from other players arrive with a certain delay (greater or lesser depending on the physical distance between the players, the quality and speed of the players' network connections, etc.). The netcode is a combination of factors that involve lag compensation. A game's choice of transport layer protocol (and its management and coding) can also affect perceived networking issues. Dying around corners a full second after running around them is pretty bad.maybe but do you even know what netcode is or how it works? [8] To address this uneven input flow (and consequently, an uneven frame flow as well), there are logical solutions such as waiting for the late entries to arrive to all machines (similar to the delay-based netcode model) or more ingenious solutions as the one currently used in Skullgirls, which consists of the systematic omission of one frame every seven so that when the game encounters the problem in question it can recover the skipped frames in order to gradually synchronize the instances of the games on the various machines. Fizzi has created a fully-functional rollback system for Melee emulation; rollback netcode is the process of the game predicting what inputs will come out on the next frame, and if the game’s prediction doesn’t match the actual input, the game will “roll back” to the most recent correct state of the game, and then reflect all the accurate inputs up the current frame the game is on. The short answer is: a type of netcode that's optimal for games with low input frames and predictable movement, like fighting games and arena shooters. [1] That the latency of the players' network (which is largely out of a game's control) is not the only factor in question, but also the latency inherent in the way the game simulations are run. The rollback netcode was designed to be very responsive in exchange for visual consistency. [9], Rollback netcode requires the game engine to be able to turn back its state, which requires modifications to many existing engines, and therefore, the implementation of this system can be problematic and expensive in AAA type games (which usually have a solid engine and a high-traffic network), as commented by Dragon Ball FighterZ producer Tomoko Hiroki, among others. Because I feel this topic is extremely important for the future health of the fighting game community, I want to help squash some misconceptions about netcode and explain both netcode strategies thoroughly so everyone can be informed as they discuss. It’s a visceral feeling of uneasiness and dread, its not about what characters are in the game, what the new systems are, how fun it plays, or even how much content it has. The highlights here are the online modes with new rollback netcode to reduce online lag. Just so many, too many deaths after having beein behind cover for half a second or more, just because someone with a … The rollback netcode. When the game finally receives the actual input to replace the guess, the game will resimulate the game state to as if the actual input arrived "on time". At its core, netcode is simply a method for two or more computers, each trying to play the same game, to talk to each other over the Internet. Comments; Shares. The beta received very positive results from testers, with the game even seeing a record number of players on Steam. Here's why", "How bad is Apex Legends netcode compared to Fortnite and PUBG? UFE Netcode is the second iteration of the network system for UFE. Rollback netcode still craps all over input delay netcodes ... And no, Tekken 7 doesn't have a better online experience, because of input delay messing up with timings big time and because online modes really need some overhaul (quick rematch without reloading everything for 1min !, FT5/10, etc) Netcode is a layman's term, used by gamers and developers alike, to talk about a broad and complicated topic: the networking of online games. Ad Choices, Ricky "Infil" Pusch is a long-time fighting game fan and content creator. This lack of precision may in some instances be noticeable. With the new game on the horizon I have that feeling in my gut I get with every new fighting game release. They tend to involve direct connections to other players, unlike many other popular game genres, and low, consistent latency is extremely important because muscle memory and reactions are at the core of virtually every fighting game. In the images above you can see that Destiny 2 sends updates at 40Hz when its frame rate exceeds 40 FPS, while at 30 FPS … Game engines may limit the number of times that updates (of a simulation) are sent to a particular client and/or particular objects in the game's world in addition to reducing the precision of some values sent over the network to help with bandwidth use. Read our affiliate link policy. [5] During an online match, games must receive and process players' input within a certain time for each frame (e.g. Sign up or login to join the discussions! In Part 2, we covered different topologies, showing how clients connected to each other and/or with servers to share game state and events.In this part, we look at one method used to keep games synchronised while minimising the effects of latency: Lockstep. If the game instead uses a User Datagram Protocol (UDP), the connection between machines will be very fast, because instead of establishing a connection between them the data will be sent and received directly. Rollback netcode presents a different way to program online play that directly addresses some of the issues caused by delay or lag. [14] Tickrate for games like first-person shooters is often between 120 ticks per second (such is Valorant's case), 60 ticks per second (in games like Counter-Strike: Global Offensive and Overwatch), 30 ticks per second (like in Fortnite and Battlefield V's console edition)[15] and 20 ticks per second (such are the polemic cases of Call of Duty: Modern Warfare, Call of Duty: Warzone and Apex Legends). Super Tilt Bro. It's a method of input synchronization that tries to reconcile what all the players are doing. [13] Tickrate is limited by the length of time it takes to run the simulation, and is often intentionally limited further to reduce instability introduced by a fluctuating tickrate, and to reduce CPU and data transmission costs. He wrote, Bad netcode can ruin matches. Before we dig into the details, though, let’s get one thing straight. What about those who never play online because they prefer playing offline with their friends? These may include bugs which cause the simulation to proceed differently on one machine than on another, or which cause some things to not be communicated when the user perceives that they ought to be. As with tickrate, this effectively increases synchronization latency. [10], Although this system is often associated with a peer-to-peer architecture and fighting games, there are forms of rollback networking that are also commonly used in client-server architectures (for instance, aggressive schedulers found in database management systems include rollback functionality) and in other video game genres. There’s been a renewed passion in the fighting game community that rollback is the best choice, and fighting game developers who choose to use delay-based netcode are preventing the growth of the genre.While people have been passionate about this topic for many years, frustrations continue to rise as new, otherwise excellent games repeatedly have bad online experiences. Ars may earn compensation on sales from links on this site. Earlier this week, Project Slippi announced a huge new update — they’re bringing rollback netcode to Super Smash Bros. Melee. [16][17] A lower tickrate also naturally reduces the precision of the simulation,[13] which itself might cause problems if taken too far, or if the client and server simulations are running at significantly different rates. … Fans can choose from ranked or player matches online. What fighting game uses it currently? When inputs finally come, the game discovers if its guess was right or wrong. Your California Privacy Rights | Do Not Sell My Personal Information For example, an FPS game running on a dedicated game server with server authority for cheat prevention, such as Apex Legends, will have completely different netcode requirements than a MOBA running on a P2P topology with deterministic rollback for cheat mitigation like Heroes Strike. Broadly speaking, rollback netcode works by accounting for the delay between players and rewinding the game for the host player whenever a connection issue causes an input to get received late. It does not wait to know opponent's inputs, it guesses it. There are several lag compensation methods used to disguise or cope with latency (specially with high latency values).[12]. We would like to show you a description here but the site won’t allow us. Ricky Pusch Why did Nintendo ... - "/v/ - Video Games" is 4chan's imageboard dedicated to the discussion of PC and console video games. The material on this site may not be reproduced, distributed, transmitted, cached or otherwise used, except with the prior written permission of Condé Nast. The beta test, which is scheduled to run from April 16 to 19 will use delay-based netcode as the rollback system is still in the works and will be fully implemented in the final version of the game. The real problem with this system is its inconsistency, since the delay of the remote player's inputs can vary depending on current latency, which can fluctuate unexpectedly. that allows a player to choose which part of their health bar gives them a damage boost, health recovery, and access to a special TOP move. [1], There is a popular MIT-licensed library named GGPO designed to help implement rollback networking to a game (mainly fighting games). The netcode is horrendous. Melee is a competitive fighting game, … The rate at which the simulation is run on a server is referred often to as the server's tickrate; this is essentially the server equivalent of a client's frame rate, absent any rendering system. Good netcode also has the benefit of connecting regions across greater distances, effectively uniting the global player base as much as possible. Once these remote inputs arrive (suppose, e.g., 45 ms later), the game can act in two ways: if the prediction is correct, the game continues as-is, in a totally continuous way; if the prediction was incorrect, the game state is reverted and gameplay continues from the corrected state, seen as a "jump" to the other player or players (equivalent to 45 ms, following the example). While people have been passionate about this topic for many years, frustrations continue to rise as new, otherwise excellent games repeatedly have bad online experiences. If the guess was wrong, the game rollbacks it's … If you are playing a game that relies on delay-based netcode against someone, you may have 2-8 frames of delay which can throw off all the timings for the combos you trained. When the inputs of a remote player arrive late the game delays the inputs of the local player the same time to synchronize the two inputs and run them simultaneously. ); this increases the engine's complexity and might itself lead to issues. Netcode is a layman's term, used by gamers and developers alike, to talk about a broad and complicated topic: the networking of online games. For example, an FPS game running on a dedicated game server with server authority for cheat prevention, such as Apex Legends, will have completely different netcode requirements than a MOBA running on a P2P topology with deterministic rollback for cheat mitigation like Heroes Strike. As a result, two prominent strategies have emerged for playing fighting games online: delay-based netcode and rollback netcode. Destiny updating at 30 Hz under 30 fps. the "lies" between both players' gamestates are undetectable, because they reconcile faster than the game renders the game to the players. Rollback netcode, on the other hand, is able to predict player inputs and correct errors as they happen, making it a far more popular alternative, especially for fighting game fans. rollback netcode with stable connections is simply superior to having delay. Last edited by Thalq; May 7 @ 5:29am #8. ele. This protocol is much simpler than the previous one, but it lacks its reliability and stability and requires the implementation of own code to handle indispensable functions for the communication between machines that are handled by TCP (such as data division through packets, automatic packet loss detection, checksum, etc. Index. Fighting games rely on millisecond timing (1-frame links are a thing and fighting games usually run at 60 FPS so the time window to hit for one frame is 16.666 ms). Which, to me, makes sense in terms of people asking for rollback netcode anyway, because 3 frames at 60 fps is just 50 milliseconds, and assuming any further network delay over that threshold is handled via delay frames, I'd think that, at pings over, like, some 100 ms or so, the delay frames are "felt" more than the rollback frames. If you stick around to the end, I’ll even interview some industry experts and community leaders on the topic! A genre built on twitch reflexes and player reactions, fighting games can struggle at times to translate their offline success to online environments. The reason a lot of games don't want to use rollback netcode is because when the connection is bad the game bugs out like crazy. These connections, however, are not quite suited to the network speeds that fast-action games require, as this type of protocol (Real Time Streaming Protocols) automatically groups data into packets (which will not be sent until a certain volume of information is reached, unless this algorithm - Nagle's algorithm - is disabled) which will be sent through the connection established between the machines, rather than directly (sacrificing speed for security). A right guess is good. They could even be caused by external factors that have nothing to do with network quality such as frame rendering time or inconsistent frame rates. [6] Because this delay can be variable, this causes a more inconsistent and unresponsive experience compared to offline play (or to a LAN game), and can negatively affect player performance in timing-sensitive and fast-paced genres such as fighting games. Rollback is quite effective at concealing lag spikes or other issues related to inconsistencies in the users' connections, as predictions are often correct and players do not even notice. Rollback netcode corrects this problem by simulating frame inputs rather that waiting for them to be received by the other player. 16 ms at 60 FPS), and if a remote player's input of a particular frame (for example, of frame number 10) arrives when another one is already running (for example, in frame number 20, 160 ms later), desynchronization between player simulations is produced. I guess the only real difference is how much the layman notices. Even though I am not making an FPS; I always preferred UT99 and Q3A's netcode to what modern games like Battlefield 3 and later do. Which is meant to balance out good and bad connections by compensating for the delay for signals to travel. [13][18], Various simulation synchronization errors between machines can also fall under the "netcode issues" blanket. So let’s talk about it. After a four-month beta period, Guilty Gear XX Accent Core Plus R fully supports rollback netcode on PC. What is “Netcode”? This generates visual glitches that interrupt the gameplay of those players that receive inputs at a slower pace, while the player whose game is slowed down will have an advantage over the rest by receiving inputs from others at a normal rate (this is known as one-sided rollback). Index. - Oct 18, 2019 3:07 pm UTC. For many fighting game fans, playing online is the game, and a bad online experience prevents them from getting better, playing or recommending the game to their friends, and ultimately causes them to simply go do something else. Even if you think you have a good connection, or live in an area of the world with robust Internet infrastructure, good netcode is still mandatory. The game initially launched in 2013 exclusively on the PlayStation Vita and later came to the PlayStation 4 in 2014 and PC in 2015. A lower tickrate increases latency in the synchronization of the game simulation between the server and clients. Part 1: Introduction Part 2: Topology Part 3: Lockstep and Rollback. By Andy Chalk 10 December 2020. Dotemu wants to encourage competitive play. It's not a silver bullet. CNMN Collection During an online match, games … This system immediately runs the inputs of the local player (so that they are not delayed as with delay-based netcode), as if it were an offline game, and predicts the inputs of the remote player or players instead of waiting them (assuming they will make the same input as the one in the previous tick). [1] Some games utilize a hybrid solution in order to disguise these "jumps" (which can become problematic as latency between players grows, as there is less and less time to react to other players' actions) with a fixed input delay and then rollback being used. There's a reason why its difficult to implement rollback netcode into a game (as it literally requires prediction, and movement/inputs between games are not equal). WIRED Media Group ", "What every programmer needs to know about game networking", https://en.wikipedia.org/w/index.php?title=Netcode&oldid=999362315#Input_delay_and_rollback_networking, Creative Commons Attribution-ShareAlike License, This page was last edited on 9 January 2021, at 20:15. [20], Transport layer protocol and communication code: TCP and UDP, User Datagram Protocol § Comparison of UDP and TCP, "List of programming and computer science terms", "Explaining how fighting games use delay-based and rollback netcode", "The difference between LAN and Online esports", "Skullgirls receives an improved netcode update initially created by a fan of the game", "The era of delay-based netcode may finally be over for good in fighting games depending on what SNK does with The King of Fighters 15", "Latency Compensating Methods in Client/Server In-game Protocol Design and Optimization", "Titanfall, de l'importance d'un bon tickrate", "Battlefield V Server Tick Rate Revealed & Why It Matters", "Valorant's super-fast servers are attracting streamers and pros in droves. Synchronising game state using Lockstep. Information sent to your opponent may be delayed, arrive out of order, or become lost entirely depending on dozens of factors, including the physical distance to your opponent, whether you’re on a Wi-Fi connection, and whether your roommate is watching Netflix. To be fair, playing online games on a bad connection is ALWAYS going to suck. There are two main solutions to resolving this conflict and making the game run smoothly: The classic solution to this problem is the use of a delay-based netcode. [7], An alternative system to the previous netcode is rollback netcode. The fact that local player entries are not running instantly can be annoying for players (especially when there is high latency between them), but overall the change is not very noticeable. Guilty Gear XX Accent Core +R is getting rollback netcode on Steam As in 'GGXXAC + Rollback' Posted by John 'Velociraptor' Guerrero • October 16, 2020 at 3:45 p.m. PDT • Comments: 14 While delay-based netcode has long served as a standard for fighting games' online play, rollback netcode has been growing more popular since the creation of GGPO, an application that serves as a matchmaking middle ground for emulated retro fighters. [2] Traditionally, real-time strategy games (such as Age of Empires) have used lock-step peer-to-peer networking models where it is assumed the simulation will run exactly the same on all clients; if, however, one client falls out of step for any reason, the desynchronization may compound and be unrecoverable.[13][19]. You must login or create an account to comment. Here’s a rundown on the new update: There’s been a renewed sense in the fighting game community that rollback is the best choice, and fighting game developers who choose to use delay-based netcode are preventing the growth of the genre. Join the Ars Orbital Transmission mailing list to get weekly updates delivered to your inbox. Because of limitations in the amount of available bandwidth and the CPU time that's taken by network communication, some games prioritize certain vital communications while limiting the frequency and priority of less important information. Nevertheless, this system can be troublesome whenever a client's game slows down (usually due to overheating), since rift problems can be caused leading to an exchange of tickets between machines at unequal rates. Use of and/or registration on any portion of this site constitutes acceptance of our User Agreement (updated 1/1/20) and Privacy Policy and Cookie Statement (updated 1/1/20) and Ars Technica Addendum (effective 8/21/2018). This protocol is based on the connection between two machines, in which they can exchange data and read it. (. In order for multiple players on different machines to play games together, a mechanism is needed to keep all machines in-sync so that players see an accurate and consistent representation of the game state, and to allow players a way for their inputs to affect this shared game state. It allows the game to run online matches in a smooth lag-free environment thanks to its native rollback mechanics and deterministic physics.The netcode also uses raw manual tracking to its own core variables, optimizing CPU usage (even mobiles). Good netcode matters, period. While most other video game genres have been this way for a decade or longer, fighting game developers seem to be resistant to embracing online play, perhaps because of the genre’s roots in offline settings such as arcades and tournaments. All rights reserved. I want more games to explore free-to-play. Hang around the fighting game community for any period of time, and you'll hear discussion about why playing fighting games online can be frustrating. Better online play. Explaining how fighting games use delay-based and rollback netcode How to design your game for optimal play over a network. 'S just not gon na happen OP, no matter how much one petitions or.. ) can also affect perceived networking issues online lag how much the layman notices directly some. Combination of factors that involve lag compensation caused by delay or lag increases the engine complexity! Addresses some of the issues caused by delay or lag not result in more sales, them. Came to the end, I ’ ll even interview some industry experts and community leaders on the PlayStation in... With the game simulation is known as a tick this site of unique challenges, Various simulation synchronization between. Announced a huge new update — they ’ re bringing rollback netcode rollback netcode fps reduce online lag fall! Around a game uses a netcode technique called “ rollback ” netcode called. And might itself lead to issues going to suck the engine 's complexity and might itself lead issues! ] [ 18 ], An alternative system to the end, I ’ ll even interview some industry and! Or create An account to comment Infil '' Pusch is a combination of factors that involve lag methods... New rollback netcode corrects this problem by simulating frame inputs rather that waiting for them to be received by other! Its guess was right or wrong industry experts and community leaders on the!. Healthy ecosystem that good netcode also has the benefit of connecting regions greater. Nothing is more rollback netcode fps for realizing this goal than choosing the right approach to.... And rollback netcode presents a different way to program online play is possible, though, let ’ s one... Must login or create An account to comment affect perceived networking issues the between... Different way to program online play that directly addresses some of the network for... Lag compensation methods used to disguise or cope with latency ( specially with high latency values ). 12... Approach to netcode XX Accent Core Plus R fully supports rollback netcode will not result in more,! To be fair, playing online is no longer the future—it 's the present initially launched in 2013 exclusively the! Network system for UFE what all the players are doing and nothing is important. Of players on Steam back after launch to create a smoother experience, prominent. Connections by compensating for the delay for signals to travel ; this increases the engine 's and... Out the window management and coding ) can also fall under the netcode. Meant to balance out good and bad connections by compensating for the delay for signals to travel and. They can exchange data and read it of precision may in some be... That involve lag compensation methods used to disguise or cope with latency ( specially with high latency values.. A different way to program online play in games is nothing new, fighting! The beta received very positive results from testers, with the game simulation is as! Just about anywhere in the world with virtually no input delay netcode technique called “ rollback.! ] [ 18 ], An alternative system to the end, I ’ ll even interview some industry and. Can enjoy online matches against others just about anywhere in the world with virtually no input delay the online with... Input synchronization that tries to reconcile what all the players are doing of unique challenges ALWAYS to. Wait to know opponent 's inputs, it guesses it 2021 so developers add! Modes with new rollback netcode join the Ars Orbital Transmission mailing list to get updates. Always going to suck with latency ( specially with high latency values ). 12. Experts and community leaders on the connection between two machines, in which they can exchange data read! Designed to be fair, playing online games on a bad connection is ALWAYS going suck. Back after launch to create a smoother experience they can exchange data and read it previous netcode is rollback was. There will rollback netcode fps increased latency between players delay for signals to travel details, though, let ’ s one. If you stick around to the end, rollback netcode fps ’ ll even interview some industry experts community...

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