Teenage Mutant Ninja Turtles - Mutant Melee

April's adventure mode:
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As Donatello, successfully complete the Ghetto level. 

April's Apartment stage:
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As Donatello, successfully complete the April's Apartment 2 level. 

April's melee mode:
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As Casey, successfully complete adventure mode. 

Autumn stage:
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As Michaelangelo, successfully complete The Dojo level. 

Casey Jones' adventure mode:
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As Raphael, successfully complete the Subway level. 

Casey Jones' jacket costume:
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As April, successfully complete her adventure mode. 

Casey Jones' melee mode:
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As Casey Jones, successfully complete adventure mode. 

Casey Jones' red shorts costume:
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As Casey Jones, successfully complete level the Ghetto level. 

Dojo Complete stage:
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As Casey Jones, successfully complete the Turtle's Lair level. 

Foot Soldier's adventure mode:
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As Raphael, successfully complete his adventure mode. 

HUN 2's melee mode:
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As HUN, successfully complete his adventure mode. 

HUN's adventure mode:
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As Michaelangelo, successfully complete his adventure mode. 

Level select (beta version):
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Start the game with the -unlocked command line parameter to unlock 
all levels in adventure story mode for all characters currently 
unlocked. 

Monster's melee mode:
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As Hun, successfully complete the Sewer Canal level. 

Sewer Falls stage:
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As Raphael, successfully complete the Sewer Falls level. 

Sewers stage:
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As Leonardo, successfully complete the Sewers level. 

Shredder's adventure mode:
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As Donatello, successfully complete his adventure mode. 

Shredder's gold costume:
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As Shredder, successfully complete his adventure mode. 

Shredder's Palace Exterior stage:
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As Leonardo, successfully complete The Lab 12 level. 

Splinter's adventure mode:
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As Leonardo, successfully complete his adventure mode. 

Subway stage:
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As Leonardo, successfully complete the Sparring With Splinter level. 

Tech Foot's melee mode:
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As Foot Soldier, successfully complete adventure mode. 

Waterfall stage:
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As April, successfully complete the Turtle's Lair level.