It is important to keep your purchase details and your Download Password for this and any game with Telltale - to my understanding the code generated for the game is specific to your computer ID - so if you reinstall your computer system you need to have game re-activated as your system has a new ID - so it's wise to backup your game to dvd/cd with purchase details and password if you want to use game later - if you give your details to anyone to activate the game then expect to have them removed from Telltale's system.