Multistorey Mayhem is a checkpoint side mission in Grand Theft Auto III, one of four in the game and a mandatory mission to achieve 100% completion. The side mission is set in the Newport Multistory Car Park in Newport, Staunton Island, Liberty City and is activated by entering any Stallion located in front of or within the car park (including one the player drives in). From that point on, the player must reach a total of twenty checkpoints located on the various parts of the car park in two minutes. The challenge lies in the fact that the checkpoints are located between pillars and in odd corners, requiring good maneuverability of the Stallion and route planning. The player may fail the mission if they exit or destroy the Stallion, or simply run out of time.