Among the highlights to Red Eclipse 1.2 are gameplay enhancements, a revamp of the heads-up-display (HUD), much-improved AI, new in-game music, several new maps, new modding abilities, and many bug-fixes. Some of the gameplay changes include impulse launching, impulse sliding, special melee actions, and a new buff system.
The open-source Red Eclipse first-person shooter is built on top of the Cube 2 engine. Red Eclipse reached version 1.0 last March while retaining some of the unique Cube features like the built-in map editing. Cube is a classic open-source engine, but sadly there hasn't been an official update to Cube 2: Sauerbraten since the middle of 2010.
Red Eclipse 1.2 is available for Linux, Mac OS X, and Windows platforms under the zlib license.
Find more details or grab this game from RedEclipse.net. For those wondering what this open-source first person shooter is like since its derived from Cube 2, embedded below is a video from Red Eclipse 1.0.