Digital Collection - PC
It's tough keeping track of digital games because you don't have physical copies that could be put on a shelf. Here is my list of all digital games that I own for the PC. Right now, they are all from either Steam, Gog.com, Origin, or Amazon.
I don't want to buy a game only to realize that I already picked it up during a holiday sale or whatever.
1/9/14 UPDATE: How many lists am I going to make to try to categorize my digital games? Steam and Gog.com sales are too good and I get too many games at a time to properly keep a list like this up to date.