Gog, Microsoft, probably Funcom and a number of others (I'm not into gaming, I'm just pointing out he was extremely wrong, so wrong even I could see it. Or there is some missing context that I failed to see despite trying twice now in which case a clarification might be needed.)
Edit: Blizzard and Activision publishes outside of Steam (too)? (I don't know if the publish on Steam.)
Well they have all tried breaking Steam's dominance on PC. The ones that come closest are probably Microsoft (especially with their acquisition of Activision Blizzard) and Epic. Almost all of them still publish on Steam, because they basically have to.
Gog and Funcom are drops in the ocean in comparison.
Gog, Microsoft, probably Funcom and a number of others (I'm not into gaming, I'm just pointing out he was extremely wrong, so wrong even I could see it. Or there is some missing context that I failed to see despite trying twice now in which case a clarification might be needed.)
Edit: Blizzard and Activision publishes outside of Steam (too)? (I don't know if the publish on Steam.)