Probably because they want people to play their game more. If it's more challenging to the player, the better the chance they will try to beat it more. If the cheat codes unlock really cool things,...
This is done in a couple of steps. First and foremost, you plan out the design for your game. However, since you specifically asked about coding, I'll skip the details on that.Second, you find a...
Ultimate game cards are cards that have game time for specific games on them. once the code is used, it is gone, and can not be re-used. Therefore asking for a game code is pretty pointless.