Mortal Kombat: Unchained is the name given to the PlayStation Portable version of Mortal Kombat: Deception. The game was shipped on November 13 2006. The game includes the previously Gamecube-exclusive characters Shao Kahn and Goro but also adds to the roster, Kitana, Jax, Frost and Blaze, whom were previously unplayable and only found in Konquest mode. Unlike the previous iterations of the game, all of the characters, as well as the stages, are available from the outset, thus no longer requiring the need to unlocking them though alternate costumes still need to be unlocked.
- Blaze – An Outworld elemental who was captured to incubate the means of Onaga's return, but is now free to pursue his own quest: to monitor the realms' companions and prepare for Armageddon, should they grow too powerful.
- Frost – Sub-Zero's traitorous disciple student who revived after her own freezing ability appeared to kill her.
- Jax – Soldier of the Outer World Investigation Agency who fell in battle, and revived to serve Onaga.
- Kitana – Princess of Edenia who was thought to be killed in battle and revived to serve Onaga; appears to be fully aware - if not in control - of her actions.
An Endurance mode was an exclusive new feature in the PSP version, where players can compete against a constant wave of opponents. Also, the PSP's Wireless Ad-hoc functionality could be used for Multiplayer games.