The color DND label is 100% legit, it symbolizes the revision that fix the cheat glitch
Shadow over Mystara (glitched aka special rules) rom ddsomur1. Abusing the naming system using a method involving typing a string of a certain repeated letters causes the game to become incredibly glitched, giving the players powerful items in the beginning of the game. This exploit also has a nasty side effect of causing the game to have an incredible amount of visual bugs (flickering sprites, missing sprites and mistakes in the text) and often causes the game to reboot, or worse, to freeze up. Arcade owners, unaware that the players themselves were the cause of the troubles, would often shut down the machine for repair or simply remove the game completely. Gamers on the Internet, aware of these consequences, would often refuse to post instructions on how to activate the glitch. Revision 2 of the game prevented the use of this bug.