1853 Wild West level rewardsSuccessfully complete the level in story mode under the medium difficulty setting to unlock The Colonel as a playable character in arcade mode. 1920 Aztec Ruins level rewardsSuccessfully complete the level in story mode under the medium difficulty setting to unlock Stone Golem as a playable character in arcade mode. 1972 Atom Smasher level rewardsSuccessfully complete the level in story mode under the medium difficulty setting to unlock Khallos as a playable character in arcade mode. 2019 NeoTokyo level rewardsSuccessfully complete the level in story mode under the medium difficulty setting to unlock Sadako as a playable character in arcade mode. 2280 Return to Planet X level rewardsSuccessfully complete the level in story mode under the medium difficulty setting to unlock Ozor Mox as a playable character in arcade mode. Arcade Adios Amigos level rewardsSuccessfully complete the level with a "Gold" rank to unlock Hector Babasco and Lean Molly as playable characters in arcade mode. Challenge Pane In The Neck level rewardsSuccessfully complete the challenge with a "Silver" rank to unlock the Rotating Heads cheat. Ending bonusesSuccessfully complete the game under the easy difficulty setting to unlock the Cardboard Characters cheat and Streets level in arcade mode.
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