Super Mario RPG and Resident Evil 4 are both easily in the 20's. If we count generations of Pokemon games as one then RBY is around 12. Probably 7 or so for RE5. Fallout 3's main story is a solid 10.
EDIT - TES 4: Oblivion is around 10 as well, if we count main story only.
EDIT 2 - I've beaten a lot more games a lot more times than I can remember. Every post I read brings back a flood of memories of shit-kicking weekend marathons.
OoT, TMNT 3 & 4, Super Mario World, SMB3, all 3 Metroid Primes, Megaman 1&2, Sunset Riders, Starfox 64, Super Mario 64, Super Mario Sunshine (holy shit... I AM a Nintendo fanboy! Why didn't any of you tell me?!?!?!?!?!?) Fable, Halo 1, XIII, AC 1, Arkham Asylum, and every Splinter Cell.
I beat all of these (and more) a minimum of 3 times. Am I really more nerdcore than the Escapist or are we just forgetting everything?