Not sure either to post this in the Reverse Engineering forum but I was doing an Active Disassembly of the Revenge of Shinobi prototype that was accidentally included in the Sega Smash Pack release and discovered something really bizarre that I can't find any information on. I did a complete run through with the entire game to see what data wasn't accessible in game and came upon one subroutine that was never touched that's included in the game's main loop. At first I thought it was some credits sequence that was half implemented but just never called. Turns out I couldn't be further from the truth: A very simple Shinobi minigame! It's just one screen, no points, enemies, sound, etc. The only thing you can do is jump around. Pressing start goes back to the Sega screen. I'm not used to creating Game Genie codes, but as far as using a debugger goes, here's how to access it in Exodus: 1.) Set a break point at 0000026A 2.) (re)Start the game and hit the break point. 3.) Open up the Register window and change the value in A1 to 0000F32E 4.) Step and resume the game and enjoy! I recall a similar kind of "game within a game" easter egg in Arnold Palmer Tournament Golf. I checked REV00 and there isn't any reference to this anywhere in the ROM, afaik.