In Portal of Praevus, the four heroes from Hexen II return to Eidolon's castle to investigate an unnatural winter that has fallen across the land. A fifth character - the Demoness, Eidolon's former minion - also comes to investigate this ill-omened phenomenon. You choose one of these five characters and the game begins with you leaping into a huge fissure to investigate the fortress that lies beneath Eidolon's castle.
The game features 15 new levels, split between two hubs: Blackmarsh (the subterranean castle) and Tibet. In general, the levels are very well designed and seem to be a tiny bit smaller (and more manageable) than their predecessors. The architecture and texture quality are quite spectacular, and you'll often find yourself gaping at the amazing detail of the rooms while archers pelt you with arrows. Raven indeed has a flair for intricate room design, and it has never been more apparent than in Portal of Praevus. Eerie crypts, majestic throne rooms, meditation chambers, and snow-covered courtyards highlight an impressive list of settings in this game.