Which PSP game should I buy ?

I would suggest God of War (both games). I played them both and those two games actually introduced me to the whole franchise (I didn't have a PS3 yet when I played Chains of Olympus and Ghost of Sparta). Great hack n' slash gameplay, and wonderful story-telling for both games (same goes to the console versions).

God Of War Chains of Olympus & Ghost of Sparta both are the best games.

Silent Hill Shattered Memories is such a good game! It's more like a Silent Hill fan fiction made into a game, but there are so many great things about it. The story, the choices, the fear, the psychology, definitely worth playing!

God Of War - Ghost of Sparta

go with god of war if you like dark environment and blood the buy ghost of sparta otherwise chains of olympus i recomand buying ghost of sparta it has good graphics and longer gameplay

Silent Hill - Shattered Memories is a sick and twisted game just like the movie. I recommend you get it if your into that kinda stuff. It also has a good storyline and great graphics.

God Of War! You can never go wrong with God Of War games

however you do, do no longer purchase the Sims 2. You spend like and hour observing it load, take some steps and flow into yet another development, which starts off loading back. Lulls me to sleep

Check the below URLs to know more about PSP game to buy:

http://kotaku.com/5878869/the-12-best-games-on-psp

http://www.gamesradar.com/psp/games/

http://www.gamesradar.com/15-best-psp-games-downlo...

http://www.pocketgamer.co.uk/r/PS+Vita/PS+Vita/fea...

http://www.ign.com/articles/2011/12/28/the-top-25-...