I'm so upset, I had purchased all 3 games on my old pc, but when I got the new one, I couldn't remember my key for the games I don't know what to do as i also don't remember what site I bought them from. Looks like I'm going to have to repurchase the games

You can find help with determining where you purchased the games by reading through this answer in our Support FAQ.

I'll have to try each site and see if it looks familiar. I don't remember which siteI bought it from.