Players can recruit and train bizarre creatures—ranging from sentient vending machines to "evil ice cream cones"—to fight alongside them in a Pokémon-esque collection system.

For users on modified Xbox 360 consoles, this title was originally released via rather than as a standard retail or Arcade (XBLA) title. Penny Arcade's On the Rain-Slick Precipice of Darkness 4

The story picks up immediately after Episode 3, with the world destroyed and the protagonists, Gabe and Tycho, trapped in a surreal dimension called the "Underhell".