Open Source Game Review: Open Arena
Open Arena is a Quake 3 style First Person Shooter built on the GPL licensed Open Source Quake 3 engine. It's a stand alone game, so you don't need Quake 3 Arena to play it. Just like Quake 3 Arena, it's a full on, 3d FPS done in the traditional deathmatch style.
While sporting older graphics, and still functioning in a beta state (current version is 0.6.0), it's got all you'd expect from a full blown game, including intelligent bots (and boy are they smart! >.<), well balanced weapons, high paced action and excellent levels. While it takes at least 5-8 players on some of the larger maps before things get interesting, it's still lots of fun to play. But if Deathmatch isn't your style of play, Open Arena also includes "Capture the Flag" and "Tournament" modes.
The character models are quite interesting as well. Aside from the traditional "quake" style characters you'd expect to see in the game, there are several others that add an interesting spice to the game.