Multiplayer-focused first-person shooter video game developed by id Software. Quake III Arena is the third game in the Quake series and differs from previous games by excluding a traditional single-player element, instead focusing on multiplayer action. The single-player mode is played against computer-controlled bots.

Notable features of Quake III Arena include the minimalist design, lacking rarely used items and features, the extensive customizability of player settings such as field of view, texture detail and enemy model, and advanced movement features such as strafe-jumping and rocket-jumping. It features music composed by Sonic Mayhem and Front Line Assembly founder, Bill Leeb.

The game progress is saved in ~/.q3a/baseq3/q3config.cfg and mods can be installed locally by copying the .pk3 files to ~/.q3a/baseq3/.