Painkiller is a first-person shooter set in the sinister world of gothic horror. As the mercenary known as Painkiller, players are charged with the task of eliminating the undead in whatever lair, tomb, or residence they may be lurking in. Dressed in a black overcoat and wearing sunglasses to protect himself from the harsh glare of sunlight, Painkiller has earned a reputation for his no-nonsense approach to demon hunting. Yet he also hides a secret: a pact with a demon has granted him special powers at the expense of his humanity. rnrnPainkiller must fight his way past hordes of undead creatures while freeing whatever is left of their souls. With every 100 souls collected, Painkiller can transform into a ghastly creature himself, using its physical strength and ferocity to engage multiple demons at once. Players will also have at their disposal an arsenal of ranged weapons, all of which feature primary and secondary attacks. Painkiller uses the Havok physics engine for its interactive 3D environments and details such as moving clothes, rippling water, and crumbling walls.