games on my iMac

[theFranchise25]

looking at my iMac on my sig am i able to run all games or just some basic ones? right now my wife runs diner dash 2 and ive loaded an age of empires 3 demo and they both run fine. If i get the full version of say COD 2 or Guitar hero, Battlefield 2142, Star Wars etc...am i able to run these? I dont know much about Graphics cards.
also, anyone know any good game download sites. even demos. ive been searching for a Battlefield 2142 demo forever. Low on money for full versions right now.

 

[flopticalcube]

Most games should run fine on low-medium settings.

 

[theFranchise25]

the demo of age of empire 3 and COD 2 (demo) runs good. i was just worried about the full versions since i got the lower end iMac thanks