HeXen II is a Action, FPS, Classic PC game, developed by Raven Software, available on Steam and published by id Software.
The Four Horsemen of the Apocalypse lurk in the shadows before you. They are Death, Pestilence, Famine, and War. They are the root of all that is evil. They are the least of your worries. The last know Serpent Rider, Eidolon, lives.