At the "Bonus Content" menu, select the "Enter Code" option. Enter one of the following codes at the "Secret Cheat" screen to unlock the corresponding cheat option. Then, enable the unlocked cheat at the "Secrets" menu.
Effect Code All Combos Swampfire / Gwen / Kevin / Ben Infinite Aliens Ben / Swampfire / Gwen / Big Chill Invincibility Kevin / Big Chill / Swampfire / Kevin Level Lord Gwen / Kevin / Big Chill / Gwen
Contributed By: XANA009.
Complete the Carnival stage to unlock the following.
Unlockable How to Unlock Concept Art 01 Complete Carnival level Spidermonkey Complete Carnival level
Contributed By: Warhawk.
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You can submit a problem report for any non-working or fake code in the lists above.