Hey there. I'm making a SP lobby of sorts, and would like it to function a bit like the MP one where depending on what levels you've completed, certain things pop out/activate etc.

I have a feeling I'll have to use vscripts for this, so I'm wondering - has anyone tried doing this? Or how do I even do it, as the documentation on vscripts seems a bit... bare.

Yes, you have to use vscripts, valve uses that to combine all the maps together in a menu instead of sp_transition_list.nut. Unfortunately, I don't know how to make my own coop script, I only know how to edit the official one, though no one will see the name because you both have to have the same file for it to work. Anyway, If I were you, I would just copy everything and edit the names