This isn't entirely true. Most (all?) of the games require the Steam client which they are constantly updating and increasing the system requirements for. Syste

This isn't entirely true. Most (all?) of the games require the Steam client which they are constantly updating and increasing the system requirements for. Systems that could previously run the Steam client and games just fine can no longer run those same games after a while. If I remember correctly the Steam client no longer supports systems running Windows XP, Windows Vista, OS X versions before 10.10, etc... to name a few. This is currently preventing me from running some games I've purchased and I will no longer be making any purchases on Steam until they resolve this problem.