Hexen II Mission Pack: Portal of Praevus

Hexen II is a dark fantasy first-person shooter. It is the third game in the Hexen/Heretic series, and the last in the Serpent Riders trilogy. Using a modified Quake engine, it features single-player and multiplayer game modes, as well as four character classes to choose from, each with different abilities. These include the "offensive" Paladin, the "defensive" Crusader, the spell-casting Necromancer, and the stealthy Assassin.