SuperTuxKart is a free 3d kart racing game; it focuses for on fun than on realism. On the tracks you find gift boxes, bananas and nitro boosts. Gift boxes give you an extra like a bowling ball which you can use to knock over your opponents, bananas do something bad with your kart and nitro boosts will make your kart faster.
Most karts are driven by mascots of free software, for example Tux from Linux (hence the name “SuperTuxKart”) or Puffy from OpenBSD.
See the great lighthouse or drive through the sand and visit the pyramids. Race under water or in space, watching the stars passing by. Have some rest under the palms on the beach (watching the other karts overtaking you :) ). But don't fall into the volcano.
You can do a single race against other karts, compete in one of several Grand Prix, or try to beat the high score in time trials on your own. The game also contains a story mode in which the evil Nolok kidnaps Gnu and you have to win many races and grand prixes to free Gnu.
You can play with up to 4 friends on one PC, racing against each other or just try to beat the computer.
The game can be extended with add-ons from inside the game. Those add other karts and tracks.