We previously heard that Warner Bros. and NetherRealm were up to something with an iOS Injustice: Gods Among Us title. It's now out and features the ability to unlock content in the console game and vice versa.

The free iOS title (also featuring items you can pay for) is a 3-on-3 tag-team title that features a collectible card mechanic and touch screen fights. Characters like Superman, Batman, Wonder Woman, and Green Arrow will build up their move sets and become increasingly powerful.

Items in the game will be transferable to the console version (out for Xbox 360 and PS3 on April 16) and vice versa. It's not known if the pay items will be the ones that you can move over.