GAME GENIE CODES: I.

 Immortal

 Incredible Hulk

 Insector X

GAME GENIE CODES: J.

 James "Buster" Douglas KO Boxing
 James Pond - Underwater Agent
 James Pond 2 - Codename RoboCod
 Jammit
 Joe Montana Football
 Joe Montana's Sports Talk Football 2
 John Madden Football ('91)
 John Madden Football '92
 John Madden Football '93
 Judge Dredd
 JuJu
 Jungle book
 Jungle Strike
 Jurassic Park
 Jurassic Park - Rampage Edition

GAME GENIE CODES: K.

 Kid Chameleon
 King's Bounty
 Krusty's Super Funhouse

GAME GENIE CODES: L.

 Lakers Vs Celtics & the NBA Playoffs
 Last Battle - Legend of the Final Hero
 Lethal Enforcers
 Lion King

GAME GENIE CODES: M.

 M1 Abrams Battle tank (see  Abrams Battle Tank)
 Madden Football '91 (see John Madden Football ('91))
 Madden Football '92 (see John Madden Football '92)
 Madden Football '93 (see John Madden Football '93)
 Madden NFL '95
 Madden NFL '96
 Mario Lemieux Hockey
 Marvel Land
 Maximum Carnage
 Mazin Saga
 Mean Bean Machine (see Dr. Robotnik's Mean Bean Machine)
 Megagames 1
 Mega Trax
 Mega Turrican
 Menacer 6 Pack
 Mercs
 Michael Jackson's Moonwalker
 Mick & Mack as the Global Gladiators
 Mickey Mania
 Mickey Mouse - Castle of Illusion (see Castle of Illusion starring Mickey Mouse)
 Mickey Mouse - World of Illusion
 (see
 World of Illusion starring Mickey Mouse & Donald Duck)
 Micro Machines
 Midnight Resistance
 Might & Magic 2 - Gates to Another World
 Mighty Morphin Power Rangers
 Mike Ditka Power Football
 Moonwalker (see Michael Jackson's Moonwalker)
 Mortal Kombat
 Mortal Kombat 2
 Mortal Kombat 3
 Ms. Pac Man
 Musha
 Mutant League Football
 Mutant League Hockey