HangSein - Seinfeld Hangman Game - http://www.galant.org/hangsein.shtml
An online game of Seinfeld hangman.
Seinfeld The Game - http://members.ozemail.com.au/~tdambra/gameindex.htm
Currently a work in progress, this game includes 5 levels.
Seinline - http://membres.lycos.fr/cfecteau/seinline.htm
Seinline is a video game that combines "Columns" by Sega and hidden quotes from the show.