Round 1 screen of Pat the Baker.
Pat The Baker is one of Billy's favorite video games.
It involves a chef named Pat. Billy helps Pat make various meals. The game is prominently featured in the episode, Brown Evil.
Mandy saw Billy playing the game and thought it was stupid, so she yanked it out of his Lame Cube and broke the disc, causing Billy great sadness.
After defeating the zombies, Hoss Delgado rewards Billy by letting him play his copy of the game.