As part of the Irrational Games relaunch, they also launched the first episode of their official podcast called Irrational Behavior. The first episode talks about ideas for games that died and during the podcast Irrational team members revealed plans for a zombie tactical shooter that ultimately was never made.

The game was called Division 9 and was first pitched in the early 2000s to the now defunct Vivendi Games as a possible new direction for the SWAT series (Irrational had developed the fourth game in the series from the publisher). The game was prototyped as a kind of shooter with some strategic elements. While Vivendi passed on the game, Irrational head man Ken Levine said they actually sold Division 9 to an unnamed publisher. However, for reasons that were not entirely made clear in the podcast, the game was canceled. Irrational went on to be bought by Take Two Interactive and of course made the original BioShock. The web site plans to reveal assets from Division 9 on January 22.

By the way, the podcast is definitely NSFW so listen with headphones. Perhaps while playing Darksiders or Line Rider if that floats your boat.