I never hear anyone talking about Valve when discussing which game engine to use.
And I couldn't even really figure out what the terms were from their website.
Apparently the engine is Free if you buy any game built on it.
So basically for $9.99 I just buy half life 2, and then I have a complete access to royalty free use
that engine to build a game?
Or is this just a modding tool, that a game can't be built with?