An overhead scrolling game (like
Gauntlet, but with
caffeine instead of food) that lets you play as
Tux,
BSD Beastie,
KDE dragon, A
Gnome, A
Gnu, the
Vi possum from the
O'reilly books,
Linus,
RMS and others.
One can play a single player game against Microsoft, or wage holywar multiplayer network games, such as Linux vs BSD, KDE vs Gnome or Vi vs Emacs.
http://xtux.sourceforge.net