Blood built on the foundation that Duke Nukem 3D laid down. The main character, an early 20th century gunslinger named Caleb, is out for revenge against a dark god. The game incorporates both occult and horror themes, and features an arsenal of cool weapons like a Tesla rifle and flare guns. It also lets you use voodoo dolls against your enemies. Toss in one liners that are even more over-the-top than Duke Nukem's, and you've got an awesome 90s shooter.