The 355,000 players caught cheating on Apex Legends were all using the PC version of the game, the studio behind the game has said.
Respawn Entertainment said it intended to be “secretive” about its plans to combat cheating, so as not to forewarn players trying to break the rules.
Apex Legends has attracted 50 million players since its release last month.
It is often compared with Fortnite, which has 200 million players and was released in July 2017.
Both shooter games are in the form of Battle Royale – where players fight against each other until only one survives.