best stealth psp game
This is simply the best stealth game, since psp gamers don´t have a gret metal gear version. This game rocks!!!

Great value game
Once you're done with the game, you will find yourself replaying the levels a few times to earn all the rankings. It doesn't get tedious as you will earn new weapons, and some rankings will require you to approach a level differently from before, e.g is on how you must take out an enemy.
Sure, the game's story and cinematics can't go near the Metal Gear series, and so does the stealth elements, but remember that, when you're comparing to Metal Gear, you're comparing with THE best in the genre. So till the next metal gear game (peacewalker) on the psp arrives you should give this series a try.

No title
nothing was left out of this game. the story is deep and well-told through full voice/animated cutscenes. the game itself is atmospheric and suspenseful. the controls are well-mapped, and the gameplay is challenging and rewarding. there are tons of unlockables/challenges to keep you playing. overall, from music to graphics to gameplay, this is a great experience on the psp.

Fantastic game!!!!!
It's a rare thing when a game actually defines a system. Not an easy thing to do in any case, but once in a great while a title comes out that sums up the perks and potential of a particular game system. Halo defined the Xbox, for instance, while Final Fantasy X did the same for PS2. Now, Syphon Filter: Dark Mirror has done the same exact thing with the Sony PSP. It exploits just about every technical capability the little system has to offer, and it does so with an extreme degree of elegance and refinement.