Ryan McAvoy said:
The original 'Arkham Asylum' is the best of that bunch ^ IMO. But my favourite titles on the PS3 (Excluding AA) have been (In order):
1. Deus Ex: Human Revolution (By a huge margin. Characters you care for, complex story, action, stealth, gorgeous design, it has it all)
2. Red Dead Redemption (GTA on horses. A vast world in meticulous detail)
3. Tomb Raider 2013 (Emotional stuff. Puzzles and stealth in a semi-sandbox. Becoming a crackshot with the bow is just magic)
4. Fallout: New Vegas (You could almost live in this game it's so frickin' massive and involving)
5. Wolfenstein 2009 (Big guns and evil Nazis to kill. It's pure action FPS fun)
Also Sega Mega Drive Ultimate Collection is a great way to get an instant and large collection of oldskool classics for very little. Plus the triple-bundle 'HD Collections' (Metal Gear Solid, Tomb Raider etc) are cost effective packages.
Honourable mention for 'Max Payne 3'. It's by a long way the hardest game I've ever played. It starts off near impossible but becomes more playable later on, after much practice. If you can get past the initial painful difficulty spike, it gets very good indeed.
None of those are even exclusives!
Little Big Planet is a decent exclusive. I never got the second one.
Uncharted games are pretty good. As a former Xbox exclusive gamer, these games were oft used to tell me how much better PS3 is than 360. Once I got a PS3, the first two Uncharted games were thrust upon me and I enjoyed them, but didn't think they were worth all of the hype. Had they not been PS3 exclusives, they would be less loved, I think.
I rented Last of Us and played the first 10 hours or so. Again, either I'm not in synch with Naughty Dog the way everyone else is, or I don't fall in love with the PS3 exclusives the way everyone else does. After 10 hours, I felt I had seen what it had on offer. I was ready for something else.
You probably already know if God of War is your thing. I liked the first two games and had a harder time getting into the 3rd one. The PS2 games are more simple by comparison, so it made the GoW3 seem really cluttered with too much detail by the time I got around to it.
I bought Resistance because I had heard how good it was. I played maybe an hour of it.
I liked inFamous. I never got around to the second one, but I liked the first one quite a bit.
I played a demo of Killzone 3. It seemed pretty good. I've meant to pick it up, but have never made it a priority.
I've never gotten into the Ratchet and Clank games, but those seem to be well thought of.