Painkiller: Overdose

Painkiller: Overdose is a raw first-person shooter similar to the previous Painkiller games; you run and gun for your life using an arsenal of six different weapons. Originally developed as a fan-made mod, the team was given funding to make it into a full, independent game. The weapons have both primary and secondary firing modes. The levels feature horror-adjusted versions of familiar worldwide beings from mythology and history. (mobygames.com)