[kaoD]

Open company? What the...?

This is just an SDK. It's for their own convenience! You make mods for their closed source Source engine (see what I did there?) and they earn tons of money and Steam users.

What's Open about that? How are you going to remove the Source dependency?

Game companies have been releasing SDKs since what feels like forever.

I love Valve's games, but you have to give credit where it's due.