For characters with a story mode, completing story mode unlocks one costume.
For characters without a story mode, completing time attack mode unlocks one costume.
Complete a character's exercise in sparring mode to unlock their system voice.
Complete story mode with Hitomi.
Complete story mode with Eliot.
Complete story mode with Zack.
Complete story mode with every character.
Complete story mode with Helena.
Complete time attack mode with every other character, including other unlockable characters.
Unlock SPARTAN-458.
Unlock all costumes for all characters and unlock all system voices for all characters.
