Wow, you guys have... a lot of games.

NES: (from memory, there are probably more)
Super Mario Brothers 2
Super Mario Brothers 3
Addams Family
Chip & Dale

Sega Genesis: (also from memory)
Sonic the Hedgehog 2
Sonic the Hedgehog 3
Sonic 3D Blast
The Little Mermaid
some basketball game
Madden something
X-Men

Playstation:
Suikoden I
Chrono Cross
Final Fantasy Tactics
Legend of Dragoon
Final Fantasy Origins
Final Fantasy VII
Final Fantasy VIII
Final Fantasy IX
Star Ocean: The Second Story
Xenogears

Playstation 2:
.hack//INFECTION
.hack//MUTATION
.hack//OUTBREAK
Final Fantasy X
Final Fantasy X-2
Lord of the Rings: Fellowship of the Ring
Lord of the Rings: The Two Towers
Simpsons Road Rage
Grand Theft Auto 3
Grand Theft Auto: Vice City
Ico
Xenosaga
Kingdom Hearts
Suikoden III

I think that's it.