Genesis Cheats, Achievements

 James Buster Douglas Knocko...
 James Pond 2: Codename Robo...
 James Pond 3: Operation Sta...
 James Pond: Underwater Agen...
 Jammit
 Jantei Monogatari
 Jennifer Capriati Tennis
 Jeopardy
 Jeopardy: Sports Edition
 Jerry Glanville's Pigskin F...
 Joe & Mac
 Joe Montana II Sportstalk F...
 John Madden Football
 John Madden Football
 John Madden Football '92
 Jordan Vs. Bird: Super One-...
 Judge Dredd
 Junction
 Jungle Book
 Jungle Strike
 Jurassic Park
 Jurassic Park: Rampage Edit...
 Justice League Task Force

More Cheats, Achievements...

   All The Cheats for Genesis...
   All The Cheats for All Systems...