This turned out to be pretty tough to limit to just 10. Not necessarily in particular order and remaining faithful to the games I put the most time into:
Super Mario World
The Legend of Zelda: A Link to the Past
Final Fantatsy III (as it was called in US)
Donkey Kong Country
Secret of Mana
Sid Meier's Civilization
Sim City
Gemfire
Top Gear
Super Star Wars
Honorable Mentions to Super Mario RPG: Legend of the Seven Stars, Final Fantasy II, Populous, Drakkhen, Super Empire Strikes Back, Super Return of the Jedi, Donkey Kong Country 2-3, Street Fighter II Turbo, Mortal Kombat 1-3, Genghis Khan II: Clan of the Gray Wolf, Rampart, Star Fox, SpiderMan & Venom: Maximum Carnage, Tecmo Super Bowl I-III, Super Punch-Out!!, Liberty or Death, MechWarrior, Wing Commander, Star Trek The Next Generation: Future's Past, Lost Vikings, & others I'm either not remembering or know good things of but never personally had in my collection....
