Astyanax
Blaster Master
Castlevania
Castlevania 2
Castlevania 3
Chip 'n' Dale Rescue Rangers: Back when I was into Chip n Dale this game rocked. Played it all day. Course it seemed difficult as a child, when it really isn't. Not as fun as I remember either.
Crystalis
Double Dragon
Double Dragon 2
Double Dragon 3
Dragon Quest
Dragon Warrior
Dragon Warrior 2
Dragon Warrior 3
Dragon Warrior 4
Earthbound NES
Final Fantasy 3
Ghostbusters 2: Patience wins this game. Too bad I ran out the first two times I tried to beat it.
Guardian Legend
Heroes of the Lance
Home Alone: I liked the movie, and could watch it over and over. But the game I really only liked playing the first time. After I won it just seemed to have nothing left.
Magic of Scheherazade
Megaman 1
Megaman 2: No real strategy involved, with the exception of beating bosses in a certain order. Most boss fights won't last more than a minute. Hardest part of the game is having to memorize the order of appearance of those damn dissappearing-reappearing platforms.
Megaman 3
Megaman 4
Megaman 5
Megaman 6
Metal Gear
Metal Gear 2
Rygar
Super Mario Bros.: Do I even really have to say anything? You've beat this right?
Super Mario Bros. 2
Super Mario Bros. 3: The second NES classic. Different than the first two with the extra stuff added in.
Wizard and Warriors 2
Zelda, The Legend of: One of the longer and harder NES games. Also one of the first NES games out there. NES Zelda's are recognizable by their gold cartriages. This one started it all, and it has all the classic elements.
Zelda - The Adventures of Link: We go from overhead view, to side scrolling. A totally different gameplay from the first game, but it is just as interesting and fun.