The 3D construction and simulation game Minecraft has become enormously popular on the Windows platform. But since it is implemented in Java in can also be run on Linux and Mac OS X. To get the most out of it on Linux you may have to apply some optimizations.
Minecraft has been conceived and implemented by a small group of independent developers. Players can explore a vast landscape, which is generated on-the-fly as you push forward into previously uncharted territory. The system generates geological features, villages, and inhabitants using randomized processes so that you never know what to expect.
The game enables you to build arbitrarily large and complex structures in 3 dimensions. Since the basic building blocks are rectangular blocks, everything has a kind of Lego-like look, but the advanced physics engine and texture maps make it look and feel quite realistic.
The game can be run in single-player or multi-player mode. The server software can be downloaded and installed by all users.