I have finished this gen
Halo 3
Fable 2
Mass Effect
Mass Effect 2
Gears 1 (without the final boss but apparently there is a fault with the boss so pfft)
The 2 Kefling games
Win7 phone excl "The Harvest"
Win7 phone vers of Ilomilo
Doritos Dash of Destruction
I think that is it so far in terms of achievements/trophies I havent except for Doritos and Ilomilo games, otherwise I simply got the end of the game if that makes sense.
I am in the path of finishing
Halo Reach, Fable III, Alan Wake, Beyond Good and Evil HD, Ratchet and Clank (2 of them) Killzone , Forza III, Batman Arkham Asylum and perhaps Bayonetta if I can be bothered haha.