Here is a list of all the best websites to get games for PC!
I assume you (or most of you) are PC gamers, since you are developers!
www.humblebundle.com (Donates part of proceeds to several charities.)
www.gog.com (DRM Free)
www.instant-gaming.com (Crazy deals on new games.)
That is all I have right now. If you know more please comment and I will add them to the list! Happy Hunting!