Larian Studios Forums Dragon Commander Dragon Commander - General Patch and Multiplayer Availability: Steam vs. All.

I can confirm that joining to a Steam Version with "1.0.33" reading in the menu, coming from a "1.0.33" from the vault, with "Connect per IP" does NOT work.
I can say that because that person with the Steam Version also had a "1.0.33" from GOG patched to that via the patch from the vault, and to that version, it WORKED (using the same source client).
Oh, hello Raze