MGS5: Peace Walker.

[Dyne]

I would definitely say it's worth the PSP purchase.

As for buying a PSP, I'm playing it on my original PSP-1000. Screw the new versions. You can probably get a PSP-1000 for cheap and bask in the glory of MGS5, the true sequel to MGS3. You may want to invest in a bigger Memory Pro Duo, about 1 gig, so you can install the data and experience super-quick load times. Just like Monster Hunter.