This is a recreation of the game Tetris done with centerprint (the function normally used for messages such as "3 more to go.."), a modified font, and some crazy ass QuakeC. The initial version of this mod was coded in around 3 hours on the night of 2/22/2004 in the midst of an IRC discussion about text mode Quake modding.
I originally got the inspiration to do this when viewing Frog's "pong demo", a translation of the game pong done in centerprint. I recognized immediately that something like tetris, which is designed for a grid, would be much better.