Seems like all source engine games all optimized half life 2 actually ran,on my crappy dell dimension 2400 and looked good must have been 24fps at medium settings and 720p res. --- dell xps 7100 amd radeon 5870 8gb ram amd phenom x6 1045t 3.2ghz 1.5tbhdd
What is the least optimized game I was thinking gta4 maybe metro,but it runs good if i don't use anti aliasing.
Neverwinter Nights 2.
Edit: I guess I can't really say "easily". I'm sure there's some terribly optimized fairly unknown games. But NWN2 is the worst optimized popular title I can think of. --- This message from an unbiased boardgamer. Real men use Alta Vista.