Rise of the Triad: Dark War (1994)

Rise of the Triad, a first-person shooter, is the successor of Wolfenstein 3D, with a somewhat improved 3D engine. Everything is still composed from blocks, but multiple vertical levels have been added; there are stairs made of platforms floating in air, and jump pads which launch you (and the enemies) high up so that you can walk over tall barriers in your way.

Storyline

You are part of an elite group of operatives called HUNT (High-risk United Nations Taskforce), and you must stop a maniac cult leader from killing millions of people. While scouting a remote island, you are suddenly surrounded by enemy troops with guns blaring. In the distance you see your boat--your only chance to escape--explode into matchsticks. In front of you is a huge fortress monastery, and your only chance to stop the madness.