Cube in an opensource shooter designed to run on systems with lower resources availabe. Cube uses opensource content, as well as a few quake II models, in its game portion. Cube supports both single and multiplayer. Maps can be of both large size and hold a large number of computer AI's. Cube has a large multiplayer community, and maps can be edited in real time cooperatively. There are several single and multiplayer mapping projects underway, as well as model packs and total conversions.
It's a repleacement for the pistol from AssaultCube. Now you can aim without using the crosshair, also it looks very cool :D