Shooters

Alien Shooter 2
Free
Counter-Strike 2D
Free
Free Top-Down Multiplayer Shooter.
The Guard of Dungeon
Free
A mad first-person shooter.
Cube 2: Sauerbraten
Free
A free multiplayer & singleplayer first person shooter.
TrueCombat Elite
Free
A modern world total conversion of the free, popular, stand-alone third-person shooter.
3D Sniper
Free
Destroy the international terrorists camp that is based in eastern Africa.
All Evil Night
Free
All Evil Night 2
Free
Meet monsters from your nightmares.
AssaultCube
Free
A free, multiplayer, first-person shooter game.
Carnage Contest
Free
A free 2D turn-based multiplayer shooter with fully destructible terrain and an insane collection of weapons.
PlanetSide 2
Free
A revolutionary massive scale first-person shooter where soldiers battle as one in strategic, targeted missions against enemy empires in an all-out planetary war.
Teeworlds
Free
A retro multiplayer shooter.
Urban Terror
Free
A free multiplayer first person shooter.
Zandronum
Free
Leading the way in newschool multiplayer Doom online.
3D Arcade FPS
Free
A free to play arcade first person shooter game, featuring: 6 mini arcade games, local / country / world high score YOU can be the country champion or perhaps even the world master.
Alien Arena
Free
A fast, fun, and free FPS deathmatch game!
Gnumz 2: Arcane Power
Free
Invention
Free
Invention 2
Free
Mechwarrior Online
Free
A tactical, 'Mech-based online shooter set in the rich BattleTech Universe.