Quick and cheap thrills?

I just restarted my gamefly account, for some reason they gave me the new user discount so for the first month I got 2 games, then I'll change it to 1 game if I keep it.  But I plan to buy games that I want to enjoy, like AC2 or or other games like that.  High quality games one might say.
 
I'm wondering what games out there are quick single player playthroughs, and not "terrible" games. Points aren't a bad edition as well.  I was thinking of maybe Wet and ODST.  If worst come to worst and I run out of these types of games, I may resort to point boosters. My friend is letting me borrow Avatar tomorrow so thats a good start. 
 
I'm just looking for some games that I've seen but dont want to throw down money for. $16 a month for 3-5 of these games sounds like a good deal to me.

Stranglehold, Jericho, Mirror's Edge, Wanted: Weapons of Fate would be among my top short action/shooter game picks.

Dead Space is short and single player!

the Call of Duty has great, exciting, but short single player games, which are worth your time.  
if you're itching for a more supernatural shooter, Wolfenstein is a spectacular experience that doesn't last that long, but it's a bit lengthy considering what i believe you're aiming for.  
 
Fighting Games have great single player experiences, too, along with fantastic multi player. Dead or Alive 4 and Street Fighter IV are good examples of this.  
 
I'm not sure if this is what you're looking for, but they're great games.

A bottle of whiskey and a hooker.

" Dead Space is short and single player! "

I just picked up legends of wrestlemania for £5, doesn't seem long at all and all the trophies/whatever are easy 
 http://playstationlifestyle.net/2009/03/29/trophy-guide-wwe-legends-of-wrestlemania/
The game isn't bad either, it's not bloated and complicated like the SvR shite, there's a million other better games out there though no denying.

You should just rent any shooter you see, you can beat almost any of them in a day. Then again most people have lives, unlike me.

I decided to start off with ODST and UFC. Both are available now.

"@ADTR_ZERO: I cant imagine finishing inFamous in under 12 hours?  The list I have so far of games I will try and rent are:  ODST Wanted Wet Ghostbusters X-men: Wolverine Wolfenstein UFC Undisputed <-- I know its a sports game so probably not short, but I've been tempted to pick it up but I dont want to fork over $20 or so for it. Dead Rising <-- heard its only 6 hours due to the in game clock or 2hrs=1day 50 Cent: Blood on the Sand Terminator Salvation  After these, probably point boosters.  With my last final tomorrow, and the gf busy getting ready for nursing school I plan on sitting at home and just enjoying my time. Too bad the mailman doesn't pick up outgoing mail anymore, bitch, so I gotta drive to the mailbox. "