Quake III: Team Arena is an expansion pack for Quake III: Arena that adds new gameplay modes, new weapons, new models, new maps, and more. The gameplay modes and maps in this expansion pack emphasize teamplay rather than the straight up deathmatch.
What's included in tha package:
Single Player (with bots) and multiplayer functionality
1 map (which is enabled for all of the Team Arena game types)
1 female and 1 male model - including 2 character heads
3 clan skins
4 gametypes: Capture the Flag, One Flag CTF, Harvester, and Overload
1 new weapon - Proximity Launcher
3 Team Power-ups: Guard, Ammo-Regen, and Doubler
New in-game UI
1 new useable item - Kamikaze
New main-menu UI (includes descriptions of all gametypes and power-ups
The demo is a stand-alone game, but the full expansion pack will require you to have Quake III: Arena installed to play.