If you are looking for verified Mortal Kombat titles that actually run on the PSP, you can find the following:
For the closest legal experience on PSP hardware, buy used — it's an excellent fighting game with deep content. If you must play MK9 portably, invest in a PlayStation Vita or use cloud streaming on a modern smartphone.
often crush the game below functional limits — expect crashes, missing voices, or broken animations.
The story opens at the end of Mortal Kombat: Armageddon . Nearly every fighter is dead. Shao Kahn is about to kill Raiden.