Final Fantasy 7
8
9
X
x-2 (don't laugh)

Most recently?

Too many to mention. Here´s a few:

FFIV
FFVI
FFVII
FFVIII
FF Tactics
Suikoden II
Suikoden III
MGS1
MGS2
MGS3
Kagero (it´s a PS1 game - I got it with the console)
KOTOR
KOTOR 2
Fallout
Fallout 2
Fallout Tactics
Syphon Filter
Syphon Filter 2
Call of Duty games (that were released on PS1 and PS2)
Medal of Honor games (that were released on PS1 and PS2)
Civilization 2
Sim City 2000
Freeedom Fighters
Super Mario Kart
Super Mario World
Crash Bandicoot
Megaman Legends
Megaman Legends 2
....
and many others

more then once....

2x banjo kazooie, banjo tooie, donkey kong 64, super mario sunshine, james bond GC nightfire(i think) twilight princess(so far),advance wars, pokemon silver, probably heaps more,

3x DKC, DKC 2

4x mario 64

8(?)x Ocarina of time.....lost count

(playing through OoT right now. I love that game so bad that i have new games like zack and wiki, among others, and i still play it)

@ the ghost of rubangb

Thanks for reminding me about Contra and Double Dragon. I must have played Contra a dozen times. I would have played BattleToads multiple times too, but that game was just so damn hard!