TuxPuck!

[Warren Togami]

Check out this cool game TuxPuck!  It is like 3D pong and really fun.  Homer
Simpson and Eric Cartman yell at you and make funny sounds when they are
losing.  They are relatively easy to beat with practice, but Tux is nearly
impossible!

Here's a cool screenshot
http://www.amdmb.com/vb/showthread.php?s=&threadid=100642

Download source and binaries from here.  They even have Windows binaries.
http://www.efd.lth.se/~d00jkr/tuxpuck/

Testamonials
"this game is bad ass" - Ray Strode
"Fun for an entire two minutes." - my brother