The Red Star Cheats

Completion bonuses:
After finishing the game you will unlock as Maya as a playable character and Arena mode. In Arena mode you must defeat successive waves of enemies in eight arenas.

Cheat mode:
After finishing the indicated level of Arena mode with an "A" or better rank you will unlock the corresponding cheat option at the Classified menu.
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EX Difficulty: Arena level 1
Guns never overheat: Arena level 2
Shield never overheats: Arena level 3
All guns and gun upgrades: Arena level 4
Protocol recharges automatically: Arena level 5
Health recharges automatically: Arena level 6
Wireframe mode: Arena level 7
White Texture mode: Arena level 8