centrino actually doesn't mean anything technically speaking, it's pure marketing nonsense, so it's best to ignore the word "centrino"

core2 or turion it doesn't really matter much as long as you have 2g ram and a fast hdd. better concentrate on the rest of the system: does the keyboard suck? usb port placement. ergonomics. screen. etc.

if you want real games the intel graphics x3100 won't cut it. get a laptop with a dedicated graphics card. my other laptop here has a geforce 8700m 256mb gddr3 but still won't play Crysis smoothly. an x3100 won't even play old games like NFS most wanted smoothly...