Most anti-cheat news is about catching cheaters after the fact. RICOCHET's latest addition for Call of Duty: Modern Warfare 4 takes a different route. Server Culling stops a wallhack from working by withholding the information it would have displayed in the first place.
Activision's anti-cheat team announced the feature on October 6 as a new layer of protection against wallhacks. The idea is simple to state: if an opponent's location isn't something your player should be able to know at that moment, the server doesn't send it to your hardware. Cheat software can't expose data that never reached the machine it runs on.
Why withholding data matters more than detecting cheats
A wallhack works because a game client usually knows more than the player sees. To draw enemies the instant they round a corner, many shooters send position data for nearby players ahead of time, even when walls block the view. A wallhack reads that data and paints it on screen. Detection-based anti-cheat then has to spot the program doing the reading.
Server Culling flips that around. By trimming opponent location data down to what a player is supposed to have access to, it shrinks what a wallhack can see. Team RICOCHET describes it as another layer in its ongoing fight for fair play, which suggests it sits alongside existing detection rather than replacing it.
Where it applies
According to the announcement, Server Culling covers every map available at Modern Warfare 4's launch, including DMZ and Combat Outpost. It also extends to new live-season maps for Multiplayer, DMZ and Call of Duty: Warzone starting with Season 1.
That Warzone line is the notable part. Warzone carries over between yearly releases and has historically been where cheating complaints pile up, so a protection that follows new maps into it reaches well beyond the new game's launch window.
What Activision hasn't said yet
The announcement doesn't go into the trade-offs. Systems that hold back position data have to decide exactly when an enemy becomes "visible", and getting that timing wrong risks opponents appearing a beat late around corners. Activision hasn't published how Server Culling handles that, whether it affects audio cues like footsteps, or whether it changes what killcams and spectators see. Those are the questions players will test once the game is out.
It also isn't a fix for every cheat. Aimbots that act on targets already in view are a separate problem. This is the second RICOCHET announcement in the run-up to launch, after its move against Cronus-style input hardware, and it fits the same pattern of Activision making anti-cheat part of the game's pitch before release.
Modern Warfare 4 launches October 23. Team RICOCHET has posted more on the feature through its official X and Instagram accounts.