One of the most unknown, underrated games ever made, Wrath of Earth is a fun futuristic FPS with quite a few innovations that are rarely seen in today's 3D-accelerated games.

id Software's perennial favorite Quake has probably seen more unofficial add-ons and enhancements than any other game.

Xiao Xiao series are short, immensely entertaining Flash snippets featuring stick figures who punch, shoot, and maim each other to the death in the true "organized chaos" style of Oriental...

One of the few first-person shooters on SEGA's Genesis console, Zero Tolerance is also one of the most underappreciated gems on that system.

ZPC is an original first-person shooter from Zombie that you will most likely either love or hate (I love it, incidentally).