PunkBuster是一套防止玩家作弊的软件，被应用于众多第一人称射击游戏的在线多人游戏模式中。PunkBuster常被玩家简称为PB。

原作者Tony Ray在经历过绝地要塞的作弊玩家破坏游戏乐趣之后，成立了Even Balance公司开发PunkBuster反作弊软件。

PunkBuster的第一个测试版本发布于2000年9月21日，应用在第一人称射击游戏战栗时空上。自从该游戏发售以来，开发商Valve便为了对抗作弊而长期苦战。第一个正式集成并采用PunkBuster反作弊机制的游戏是id Software的重返德军总部。

PunkBuster is a computer program that is designed to detect software used for cheating in online games. It does this by scanning the memory contents of the local machine. A computer identified as using cheats may be banned from connecting to protected servers. The aim of the program is to isolate cheaters and prevent them from disrupting legitimate games. PunkBuster is developed and published by Even Balance, Inc.