[quote=Dinh AaronMk]
Big hint: Steam is the publication platform. Valve is the development studio that owns and publishes other's titles through Steam. Steam is not a company. Steam is a tool.And Gaben is all too godly anyways. By his Will, Valve will always be "Your Cat" in the chart of studios-as-RL-friends.
[/quote]

This

Steam is just a platform really, most game companies use it to boost sales revenues due to the wider PC audience on Steam now-a-days