I just so happen to have a list of great NES games:
Ice Hockey,
Megaman 2,
Super Mario Bros. 3,
Solstice,
Ninja Gaiden,
Blaster Master,
Ghosts n Goblins,
Teenage Mutant Ninja Turtles,
Bayou Billy,
The Battle of Olympus,
Legend of Zelda + Adventure of Link,
Battletoads,
Bump n’ Jump,
Castlevania 1/2/3 (2 is really hard and different, but good),
Chip n’ Dale: Rescue Rangers,
Clash at Demonhead,
Contra,
Crystalis,
Double Dragon 1/2/3,
Dr. Chaos,
Dr. Mario,
Dragon Warrior 1/2/3 (2 and 3 are better on the gameboy),
Ducktales 1 and 2,
Final Fantasy 1,
Galaga,
Gauntlet (all of them),
Kick Master,
Kirby’s Adventure,
Kung Fu Heroes,
Legendary Wings,
Metroid,
Mike Tyson’s Punch-Out,
Power Blade,
River City Ransom,
Silver Surfer,
Street Fighter 2010,
Shatterhand,
StarTropics,
Time Lord,
1942/1943,
Xexyz
Ice Hockey, Megaman 2, Super Mario Bros. 3, Solstice, Ninja Gaiden, Blaster Master, Ghosts n Goblins, Teenage Mutant Ninja Turtles, Bayou Billy, The Battle of Olympus, Legend of Zelda + Adventure of Link, Battletoads, Bump n’ Jump, Castlevania 1/2/3 (2 is really hard and different, but good), Chip n’ Dale: Rescue Rangers, Clash at Demonhead, Contra, Crystalis, Double Dragon 1/2/3, Dr. Chaos, Dr. Mario, Dragon Warrior 1/2/3 (2 and 3 are better on the gameboy), Ducktales 1 and 2, Final Fantasy 1, Galaga, Gauntlet (all of them), Kick Master, Kirby’s Adventure, Kung Fu Heroes, Legendary Wings, Metroid, Mike Tyson’s Punch-Out, Power Blade, River City Ransom, Silver Surfer, Street Fighter 2010, Shatterhand, StarTropics, Time Lord, 1942/1943, Xexyz