In the Paris level, the Mona Lisa painting can be burned with napalm to reveal a cheat code hidden underneath: Up/Down/L1/R1. This four-button code is meant to unlock Cyburbia, a level from the first Twisted Metal game, as one of three secret stages for the 2 Player Challenge Match mode by entering it on the level select screen. However, entering this code does nothing, because the code found in the Paris level has a typo: the Up and Down buttons are accidentally switched, so the correct code is actually: Down/Up/L1/R1.