PSP: Exit.
This is a real gem in the rough that are the PSP releases.
You play an escape artist, who spends his time rescuing people from dangerous situations. The game is a 2D platformer with puzzle elements, such as sending survivors to switches to open doors or pushing crates to create safe passages. The game runs smoothly with a great sense of accomplishment when you solve a particularly tricky puzzle stage, while the game also rewards higher ranks for quicker performances.
The visuals are lovely, in a cel shaded minimalistic style that runs really well on the PSP screen. The game also, alarmingly, has no load times whatso ever.
With 100 levels on the UMD with over 100 more up for download, the game will last a long time and test your brain with some real tricky situations.
While not perfect,the game never tells you if you have failed and the game is sometimes a little too slow (emphasizing the puzzle element) it is a highly recommended title for the PSP.