Call of Duty: Modern Warfare 4 Aims to End Wallhacks With New Tech

Activision and developer Infinity Ward have unveiled a new anti-cheat system for Call of Duty: Modern Warfare 4 aimed squarely at eliminating wallhacks. According to a video posted on the franchise's official social channels and reported by IGN, the new tech is called "server culling."

The system fundamentally changes how player location data is shared. Currently, servers send information about all players' positions to each game client, which cheat software can exploit to see enemies through walls. Server culling introduces occlusion layers into the game's environments, meaning the server only sends location data for opponents a player can legitimately see.

This means if a player is hidden behind a wall, the server will not transmit their location data to other clients. "For cheat developers, this creates a major new obstacle," Activision explained, per IGN. "Cheat software can’t reveal information it never receives."

The technology will be applied to every multiplayer map at launch. Activision confirmed it will also extend to the new Combat Outpost mode, Warzone, and future updates. It will work alongside the existing anti-cheat systems.

While Activision expects server culling to disrupt the cheat marketplace, the publisher acknowledged the ongoing battle. "We won't sit on our hands," the company stated, pledging to continue improving the anti-cheat experience. Call of Duty: Modern Warfare 4 is scheduled for release on October 23, 2026.