[from developer's web site] PunkBuster is a client/server software system that is designed to provide an online countermeasures system against cheating at multiplayer online games - specifically, games and mods based on the Half-Life engine by VALVe software. Additionally, PunkBuster has a global Clan Tag Registry system built in to allow Clans to register their Clan Tags for protection on monitored servers. This prevents people from wearing their clan tag who aren't really in the clan. The list of registered tags is stored on our publicly accessible Internet website. WWW: http://www.evenbalance.com/