Some characters are be unlocked naturally by progressing through the storyline to unlock them for purchase at the store. Complete the indicated task to unlock the corresponding character.

Storyline Character	How to unlock
Alfred	Get the "Activate the Elevator" objective at the start of Hub Visit 1.
Batman (The Joker Disguise)	Start level 12.
Batman	Available by default.
Brainiac	Complete Story mode.
Cheetah	Start level 8.
Cyborg	Start level 3 and ready the rocket.
Green Lantern	Get the "Restore the Com Link" objective in Hub Visit 2.
Indigo-1	Progress through the storyline.
Killer Croc	Progress through the storyline.
Lex Luthor	Defeat Mr. Freeze at the start of Hub Visit 5.
Martian Manhunter	Get the "Restore the Com Link" objective in Hub Visit 2.
Plastic Man	Defeat Mr. Freeze at the start of Hub Visit 5.
Robin (Lex Luthor Disguise)	Start level 12.
Robin	Available by default.
Saint Walker	Progress through the storyline.
Solomon Grundy	Defeat Mr. Freeze at the start of Hub Visit 5.
Star Sapphire	Progress through the storyline.
Superman	Start level 7.
The Flash	Start level 3 and ready the rocket.
The Joker	Progress through the storyline.
Wonder Woman (Cheetah Disguise)	Start level 12.
Wonder Woman	Start level 6.