Painkiller

Painkiller is a first-person shooter video game released on April 12, 2004. It was published by DreamCatcher Interactive and developed by Polish game studio People Can Fly. It attempts to replicate the 'old-school FPS' gameplay of Doom and Quake. It has 24 levels that take place within Purgatory and Hell, and are seemingly unconnected designs that include medieval castles, factories and lunatic asylums. Five of the levels are 'boss levels' with some of the largest FPS bosses when it was released.

It is notable for using the Havok physics engine extensively, with a large quantity of destroyable objects.