A sequel to the game was planned, which was set to be "more insane" according to the game's director, Adrian Chmielarz. The idea was abandoned after the mediocre sales of the first title.
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On the very first level, and the very first door you go through, the door gets an error and can't open. This error is the red rings of death, which was a huge problem for the Xbox 360 in its early years.
Contributed by A Zombie Riot