File:Quake1.gif Hell's Fortress is the first episode of Dissolution of Eternity. It can be considered optional because the introductory level offers a direct slipgate to Episode 2, allowing players to skip Episode 1 (though this is not recommended). The episode's style can be described as a mixture of Medieval and Runic, yet the numerous new textures give the episode a style of its own. The episode's final boss is the Overlord.