If you are fan of arcade racing games, then I suggest that you play SuperTuxKart, which can be installed easily on Ubuntu. The game is inspired from famous console racing games such as Crash Team Racing, Diddy Kong Racing, Mario Kart 64, etc.
The latest version (0.7.1b) includes a lot of bugfixes, new tracks, karts, etc. The instructions given below are tested under Ubuntu 11.04, but they are also applicable on Ubuntu 10.10 and 10.04.
SuperTuxKart O.7.1b Installation
To install SuperTuxKart on Ubuntu 11.04/10.10/10.04, run these commands via the Terminal:
sudo add-apt-repository ppa:stk/dev
sudo apt-get update
sudo apt-get install supertuxkart
To start the game, search for "supertuxkart" using the dash:
Some SuperTuxKart screenshots:
SuperTuxKart Gameplay Video: