User blog comment:Spawny0908/UPDATE!!!!: The Free DLC pack is coming in...../@comment-99.62.8.73-20110729041938/@comment-809585-20110730093022

Really playing as a grizzly would ruin the game really as it would require ALOT of coding to be playable and essentially Rockstar wouldnt be able to do it and Undead Nightmare really was only done because people have wanted zombies in a GTA style game for a long time