Chains.MOD / Frayed Minds (FMM.PK) is a competitive mod for legacy Painkiller v1.15, v1.2 and v1.3 that was used in tournaments. This mod adds new sounds and messages to Painkiller, an updated HUD, and dozens of new options to customize your game.
ChainsMod v0.52-test is a multiplayer mod for Painkiller version 1.15. This mod was used in tournaments and is similar to PK++. Added for historical purposes.