These Secret Battles can only be unlocked in Arcade Mode
| Secret Battles | To Unlock |
| Secret “Jade” Battle | Do a double flawless victory on Shang Tsung and end it with a Fatality. |
| Secret “Noob Saibot” Battle | Win the battle when you see a Noob in the Temple Stage background without blocking – RT(Xbox 360) or R2(PS3). |
| Secret “Reptile” Battle | In “The Pit 2″ Night stage wait until a shadow figure flies across the moon, the do a double flawless victory and perform a fatality. |
| Secret “Smoke” Battle | In “The Living Forest” stage, press DOWN and BACK button repeatedly when you see a Smoke behind one of the trees. |
Bonus Costume and Characters for Mortal Kombat
| Unlockable | To Unlock |
| Mileena’s Fleshpit Third Costume | Finish the last level (Level 300) of the Challenge Tower. |
| Play as Cyber Sub-Zero | Finish Chapter 13 in Story Mode, then he will be available on the Character Selection Screen. |
| Play as Quan Chi | Finish all chapters in Story Mode, then he will be available on the Character Selection Screen. |
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