[depr]

I don't think success outside of Steam needs to be considered. Steam is their core business. The software itself is quite bad, but they're the dominant player by far.

Dota 2 I would estimate is #2 behind League of Legends, and it's too early to tell whether VR is working out, but guess which platform VR games are going to be delivered through?

(Besides Steam, their games are pretty successful: Half Life, Team Fortress, Portal, Counter Strike, Left 4 Dead)