Hello, I was just looking over some of your games like Race the Sun and Evergarden and noticed both of them have a warning like they are 32 bit games. If they are and don't have a 64 bit compatible version then things are what they are.

But if they are 64 bit compatible it you may want to update how they are registered with Steam so people that have newer 64 bit software using computers will know they can play them since some 32 bit games won't work with some of the newer computers (plus Steam may be dropping support for 32 bit games).