I was wondering for those who have played the game and finished it if it's worth buying for $18?  Was the singleplayer good or average?

I was going to buy but then i thought about how short it supposedly was, so i got Ratchet and Clank: Tools of Destruction; probably just as short. Still fun though

It's a great game. I'd say it's worth $18. It's no shorter than Call of Duty Black Ops, it just doesn't have multiplayer.

If you like games like Ico, Majin, Uncharted, etc., games that focus on the "experience", then you'll like it. Some people don't like the ending, but I loved it.

It's one of my favorite games from last year, but I wish I hadn't paid $60 for it. It's totaly worth $18 though.

I suppose it's good, my friend won't shut up about it...

It's a good game, I got the Platinum, definitely worth $18. If you have a choice the 360 version is supposed to run smoother, lots of screen-tearing in the PS3 version.

It's a pretty good game, especially for $18. I got on the PS3 for $16 and I loved it.

i got it launch day and it was worth it very cool story and some good moments throughout.

Unless you live in the street hell yes it is worth $18.