How do I transfer a game I purchsed off the internet to a new computer, without paying for it again?

Answer 1

Do you have the receipt or download key that was sent to you through email? You can use that same key to download it again... Send an email to the internet address where you bought the game and ask;; they can answer more precisely.

Answer 2

If you saved it to a folder on your computer before you installed it just copy it to a thumb drive then install it to a new computer.