Metal Gear 1 & 3 resident Evil 2+4 God Of war 1+2 Valkyrie Profile 2 Final Fantasy 6 Persona 4 Fees and the list goes on ....
I would have to say Grand Theft Auto on PC. I also like Postal and Postal 2 on PC. As for the greatest game of all time, I would have to go with Super Mario Bros. on NES and Arcade. I think I spent hundreds of dollars in the arcade in high school and college on it.
Back to the classics. I have to say something like Mario too. My fav one was on N64. You just don't get games like that anymore.