http://psp.ign.com/articles/960/960711p1.html

Closing Comments
So, yeah -- I like Resistance: Retribution. A lot. I think it's probably one of the most complete packages ever to come to the PSP. It has an engaging storyline, a likeable main character, tons of reasons to play it again, and one of the greatest multiplayer outings we've ever seen on this system. I think the setup might tread a little bit too closely to its Syphon Filter roots and I wish the gameplay was just a bit more challenging as a standalone product, but those minor gripes shouldn't keep anyone from playing this excellent game.

Rating	Description
out of 10	click here for ratings guide
9.0	Presentation The movies, dialogue, and Grayson journals connect you to this character in a way that makes you cheer for him. The setup is a lot like the last Syphon Filter, but it's still great.
7.5	Graphics The CGI movies look great, but everything else is your standard definition for "good" on the PSP. The scope is big and the enemies are varied, but I never felt impressed.
9.5	Sound Man, the orchestra is out of this world. When you're battling a gigantic Titan and the music kicks up, you can't help but get excited. The voices are great, too.
9.0	Gameplay The weapons are fun, the ease of cover is great, and it's a wonderful ride. I wished it could've been more challenging at points, but the online and replay options help that issue.
9.5	Lasting Appeal There are three ways to play the solo story, Skill Points to unlock, Intel to find, 12 multiplayer ranks to achieve, and 22 multiplayer medals. That's incredible.
9.2 Outstanding	OVERALL (out of 10 / not an average)

And UK here

http://psp.ign.com/articles/960/960358p1.html

Closing Comments
With the PSP languishing in the UK relative to its amazing success in Japan, it feels like there is a weight of expectation associated with Resistance: Retribution and the surge it’s supposed to spark. The game never quite meets up to that weight of expectation, or to the excellence of the previous games in the Resistance series. Nevertheless, if you take it on its own terms it is a solid enough title, hampered only by the PSP’s lack of a second analog stick and the terrible script. Whether that’s enough depends on whether you’re a PSP-owner looking for an uncomplicated bit of fun, or whether you’re a massive corporation trying to revive the fortunes of an increasingly overlooked bit of hardware.

IGN UK Ratings for Resistance: Retribution (PSP)

Rating	Description
out of 10	click here for ratings guide
6.5	Presentation Cut-scenes are technically very competent, but they’re hampered by a bad script, bad acting, and they last too long.
7.0	Graphics The game looks as good as anything else on the PSP, but the murky brown palette is a little uninspired.
7.0	Sound It sometimes sounds tinny, but generally Retribution’s soundtrack is rousing and atmospheric.
7.0	Gameplay It can feel a little simplistic at times, thanks to the super-powered auto-aim, but there are enough twists and turns to keep things reasonably interesting.
7.0	Lasting Appeal You can go back and replay unlocked missions for extra skill points and intel, but the real draw is the multiplayer, which is excellent.
7.0 Decent	OVERALL (out of 10 / not an average)

Thats a huge difference, personally I wont be picking this one up

I'll get it when it's a little cheaper.

i need this game now! But first i need a psp :P

I thought someone already posted this o.O

Oh well, good score from IGN. First time for me seeing a huge difference between IGN and IGN UK.

These was a similar disparity with Flower, but the opposite: IGN UK gave it a 9, IGN US gave it 6.5 or so.

IGN are rather exciteable lately, aren't they? They're handing out 9+ to every game that comes along. And I find it quite difficult to believe that a PSP 3rd person shooter is better than Okami and Uncharted.

gametrailer just gave it 9.4

Keep in mind most of the UK sites hate PSP for some reason.

Gametrailers just gave it 9.4, which is higher than their Resistance 2 score.

So there.

Your logic makes no sense.  So they're biased towards the ps3 and shooters because they gave one ps3 exclusive shooter .1 higher than another ps3 exclusive shooter, going against the norm? 

OT:

Good scores from IGN and GT, but I probably won't be buying this (at least not initially - I may pick it up down the road just becuase it's another Resistance title, though I'm not really into the series, and I don't know why I keep doing this =/).  The controls were pretty bad, but I hear that's the way all shooters on the PSP are.  Maybe I just need to get used to them, but it seems kind've pointless to make a shooter that actually requires copious amounts of auto-aim.  I'll try it down the road, and maybe I'll like it once I get used to it.

RE: controls, If you have PS3, you can use Dual Shock 3 - that's what I'm planning to do.