SDK is all screwed up.

So i just reinstalled steam and now it seems the content configurations on SDK aren’t willing to reset.
I installed HL2 / the two HL2 episodes and SDK / the two SDK bases.
Shouldn’t this work by then? Or do i have to install TF2 and Portal too?

Try running the games (start it up and close it), usually this problem is because gameinfo.txt does not exist. It is created upon start of the game.