Activision has started blocking Warzone players from accessing multiplayer modes if they're running Warzone Agent, a third-party application that costs $39.99 annually. The ban went into effect following the Season 1 update on November 6, which introduced new maps and a fresh progression system. The anti-cheat system now detects when the app is running alongside the game and forces players to shut it down or face multiplayer restrictions.

Warzone Agent functioned by allowing players to input their lobby ID during pre-match lobbies to receive the average skill rating of all participants. This enabled users to cherry-pick matches with lower-skilled opponents and bail out of challenging lobbies, a practice known as lobby shopping. While the app didn't provide aimbots or wallhacks, it gave paying users information advantages unavailable to regular players.

The enforcement comes with serious consequences. Players who refuse to close the application lose access to multiplayer modes entirely, though campaign remains available. Those attempting to bypass the restriction face temporary or permanent account bans, and potentially hardware bans that lock entire devices out of the game.

The Call of Duty development team emphasized that any software offering unfair advantages contradicts their competitive integrity standards. This crackdown continues their ongoing battle against third-party tools and represents another shift in Warzone's contentious matchmaking landscape, which has seen multiple adjustments over the past year.