GREAT TOPIC!
AND I HATE TO HEAR THAT YOU HAD TO SNEAK TO PLAY THE GREAT CLASSIC SYSTEMS LOL. HARD TOPIC. I WOULD SAY THE FOLLOWING ARE AMONG THE EASIEST IN MY OPINION, AND WHEN I SAY EASY, THESE ARE GAMES I THINK YOU COULD BEAT WITHOUT A GAME SHARK, CODES, ETC:
SUPER MARIO WORLD (SNES)
LEGEND OF ZELDA (NES) ***CERTAINLY NOT ZELDA 2 FOR NES. THAT GAME IS HARD AS HELL AND I PULLED A FEW HAIRS ON IT AND THEN RESULTED TO THE OLD GAME GENIE
DRAGON WARRIOR 1 (NES) LOVE THIS GAME AND ITS VERY BEATABLE!
MISSION: IMPOSSIBLE (N64)
SONIC THE HEDGEHOG 2 FOR SEGA GENESIS (NOT THE FIRST ONE)
GOLDEN AXE (SEGA GENESIS)
MORTAL KOMBAT 1 FOR SNES OR GENESIS
RAMPAGE FOR SEGA MASTER SYSTEM. (I NEVER PLAYED IT FOR ANY OTHER CONSOLE
OF COURSE, THE FIRST GENERATION POKEMON GAMES FOR THE GAME BOY AND GAME BOY COLOR
BOMBERMAN HERO (N64) ( LOVE THIS GAME!!)
MARIO KART FOR THE SUPER NINTENDO AND N64
THOSE ARE ALL I GOT FOR THE TIME BEING BUT I WILL POST MORE IF I CAN THINK OF THEM