OpenArena is a open-source first-person free online multi player shooter (FPS) computer game based on Quake III network enabled multi player first person shooter based on the ioquake3 fork of the id tech 3 engine.
OpenArena is a nice Old School free online multi player game.
This video gives a small impression of the game :
The current supported gametypes are as follows:
– Free for All
– Team Deathmatch
– Capture the Flag
– One Flag Capture
– CTF Elimination
– Last Man Standing
– Double Domination