MarkoH01: The only thing these games don't offer is an installer...
Off-topic:
You really should try buying Steam games from retail. I have. 80% of my 60+ games are bought retail. So yes, they do come with installers. And yes, they do install without need to connect to the Internet -- at first. But playing is another issue altogether.
If you've witnessed the deeds Valve has done to real life, innocent consumers for reasons as fleeting as a brain fart like I have with my own eyes and ears, your resolve to completely avoid them -- regardless of what games are available to GOG or Valve -- will be as absolute. I have no qualms not being able to play their "exclusive" selection.
It's not hate. I don't go out of my way to seek their annihilation, nor does this life choice come with any ill brooding. It's just principle. So I left Steam for Impulse. And when Impulse got ice-berged by GameStop, I set up shop here.