Cube

Cube is the original game that started it all. Though it has been surpassed in almost every way by Cube 2, it is a game in its own right. Most importantly, it comes with over 100 (!) maps, most of which are not available in Cube 2, with extensive single and multi player content.

Cube is also smaller in every way, in download, in hardware requirements (runs well on older video cards!), and in source code (the absolutely tiny code base is a very easy start for those wishing to experiment).

It also has some unique engine features such as the high precision dynamic occlusion culling, and its heighfield based level format.

Free Full PC Game Download (18 MB):

Sourceforge