Hellgate 1993

Hellgate 1993 is a fast, retro-inspired first-person shooter set inside a dying horror-sci-fi facility. Fight through eight hostile worlds, uncover secret routes, unlock sealed sectors, collect stronger weapons, and face a final boss at the end of every world.
Every world contains three stages: two combat missions followed by a boss encounter. Manage health, armor, ammo, keys, and your arsenal as new enemy types appear throughout the campaign. Find hidden supplies, activate terminals, survive ambushes, and bring the light back to the last surviving human signal.