Split second, but i guess at the time too many people went with Blur. Personally, i prefer driving through a michael bay movie than basically mario kart with a touch of realism... the chaos is also more funneled in split second, too.
Metal Arms, I will personally high five anyone who can tell me that they own this game for their xbox. It's freakin amazing. think run and gun third person shooter robot action. i liked it so much more than modern cover shooters, having to outgun AND outrun the opposition as opposed to staying behind a convenient wall.
Quake Wars. WAY too many people shrugged this game off and bought tf2... they were missing out. tf2 is great, and thanks to its updates its shown far more longevity, as Quake wars on the verge of death, but the mission structure and class balancing of Quake wars is immaculate.
those are the immediate ones that come to mind