Complete freeware game, developed in Game Maker with d3d.

Retro-styled FPS in the tradition of Doom and Wolf 3D. Fast engine, mouse-aimed, with quick and furious gameplay. It's fun throwback to old-school shooters -- no RPG elements, minimal story. Just kill, kill, kill.

Seven weapons, big, open levels that lend to exploration, lots of aliens to murder. What more do you want?

Trailer: youtu.be/ik16zwW72E4