Warhawks will consume you for hours on end :( be forewarned!
Ratchet and clank is an IMPRESSIVE display of technology :P fluid gameplay, fun platforming elements, and just classic blow em up fun ^^
UT3, I'm not big on frantic spazzy FPS shooters :/ I sadly enjoyed the single player much more xD
DMC, not as impressive as ratchet and clank, but overall I'd expect it to be a good game :P if you have any of the series you know what to expect :3
From 0 to KICKASS in .stupid seconds.