[Teuthida]

And PSP's is GTA. Liberty City Stories is the 7th incarnation of the series, while this is Mario Kart's 5th (6th if include the arcade version few here will ever play). And could be argued that the original GTA, 2, and London 1969 don't count...but then again MK has been one to a system whereas we've had three GTAs in four years. And if your reason is that it's a racer and not because it's a sequel I guess Forza Motorsport and the Burnout series should also be ignored as "killer apps". *shrug*

EDIT: Argh. Four min late.