Alien Arena

Alien Arena is a standalone that combines a sci-fi atmosphere with the tournament style deathmatch of Quake III Arena and Unreal Tournament 2004. With major graphical features such as GLSL per-pixel lighting, ragdoll physics, light blooms, real time lights and soft shadows, Alien Arena brings a level of beauty and immersion not generally seen in deathmatch. The game also includes mutators, adjustable effects, bot skill settings, and fully configurable deathmatch, team deathmatch, CTF, All Out Assault, Team Core Assault, Cattle Prod, and Deathball games.

The game features original artwork, with with a dark sinister atmosphere combined with an off-the-wall campiness, and trippy, techno type music. There are currently over 60 maps, loaded with weapons(each having an alternate firing mode) and powerups.

Alien Arena has fast, smooth gameplay, and players can play online against one another or against the bots, which feature multiple skill levels, and will rocket jump, strafe jump, and taunt you mercilessly.

Minimum system requirements: 

CPU: 1.0 GHz
RAM: 1024 MB
GPU: OpenGL compatible with 128 MB VRAM