Beat the game on any difficulty.

Unlock Extra Uniform

Beat the game with a grade of "E".

Unlock 2 Extra Uniforms

Beat the game with a grade of "D".

Unlock 3 Extra Uniforms

Beat the game with a grade of "C".

Unlock 4 Extra Uniforms

Beat the game with a grade of "B".

Unlock 5 Extra Uniforms

Beat the game with a grade of "A".