Cheaters are a growing problem in multiplayer gaming. As games become increasingly complex, the level of sophistication in cheat detection and anti-cheating strategy is forced to keep pace. While some developers spend the time to create their own protections, many have turned to external anti-cheat libraries. These tools are managed by a central server and offer an ideal target for attackers. We outline two practical attacks against one of the most popular anti-cheat engines and demonstrate the implications of a successful attack against anti-cheat software.