What to buy : GTA IV, Prince of Persia or Mass Effect?

I need a new game.  Looking at STEAM, there are three games I'm considering:

GTA4 if your computer can run it. And apparently, very few can

Mass Effect, Prince of Persia is waaaaay too easy and won't keep your attention for long and as far as I know GTA4 is still really bad on PC.

Didn't they release a patch for GTA IV recently?  

For PC? Mass Effect. Totally.

Yup, PC 

get Mass Effect, best choice out of the 3 you listed.

get Mass Effect, best choice out of the 3 you listed.

"Didn't they release a patch for GTA IV recently?  "

I heard Mass Effect for the PC is amazing. I haven't heard much about Prince of Persia but I know that GTA4 isn't off to a good start.

Yep get Mass Effect, specially since the Steam version remove all that protection crap the EA had and replace with simple Valve one

Definitely Mass Effect on PC, GTA 4 is good but not on PC even after the patch I've heard it still runs pretty bad, FPS below 30 still

Mass Effect. Prince of Persia is great but not as good as ME, and from what I hear GTA IV on PC is beyond broken.

Mass Effect is awesome, go for that.

Go with Mass Effect.  Besides being the cheapest option, it would be the best even if they all costed the same price.

Alright, Mass Effect it is! 

Ugh... don't get Mass Effect. It sucks so hard...