Nexuiz

[anon]

Nexuiz is a free open-source first person shooter that runs on Windows, Linux and OSX.

Nexuiz is a fast paced 3d deathmatch game project created online by a team of developers called Alientrap. It is available for download for Windows, Mac, and Linux (all the same archive).

The first version was released May 31st 2005, released entirely GPL and free over the net, a first for a project of its kind. Since then it has been downloaded over 1.5 million times, and the game is still being updated and developed, currently at version 2.5 and new releases being developed.

Link

[SBfreak]

This open source FPs game looks great and has low system reqs too.

System Requirements
400 MB of hard drive space
Windows 2000/XP/Vista (32-bit or 64-bit)
Mac OS X 10.4 or better (PPC or x86)
Linux Kernel 2.2 or better with glibc
High Quality/Recommended
- A 1.5 Ghz Intel Pentium 4 chip or AMD Athlon 1500+ or better
- 9600ati or 5700fx or better
- 512 MB of ram or better
Low Quality
- 1 Ghz Pentium III or AMD Athlon
- Geforce2 Video card
- 512 MB of ram

[anon]

Just like AssaultCube, but this one seems to be more action/deathmatch oriented. What I like about AC is that the engine is very extensible and will work on very old computers if set up correctly.