Sometimes, companies feel the need to put in cryptic measures to erase all game date (not just save files but also high scores, unlockables, etc.), such as inputting codes or holding button combinations at startup. Please tell us about any such games (pardon me if there is already a similar thread).
For my part, I am trying to find out how to erase all data (not just overwrite save files) for Harry Potter and the Philosopher's Stone for the Game Boy Color. Can it even be done? I don't have the manual, which may hold the answer... thanks in advance.