Nes

[Tommylandis]

Donkey Kong, all the marios, LoZ 2, wheel of fortune

[Excessum]

Oh man... brings up some memories

Ok, some of the games i used to play for weeks:
Battletoads & Double Dragon
Contra
The Flintstones
The Hunt for Red October
Jackal
Jurassic Park
Mega Man a.k.a. Rockmann
Batman
Ninja Gaiden
Robocop
Super Mario Bros.
Teenage Mutant Ninja Turtles: Tournament Fighters
Teenage Mutant Ninja Turtles III: The Manhattan Project

And others, i can not quite remember X)

[Retrogamer77]

Alright...:

Balloon Fight
SMB 1,2,and 3
LOZ
Burgertime
Donkey Kong
Yoshi (yes, it is a game)

All those games are AWESOME!!!

[Thunda]

Battle Tank
Mario
Adventure Island
Alien III

can't think of more



anyway, I know a site where you can play it online XD