Thanks for the reply. I posted this in the forums for the Advanced Sessions plugin as well; I guess I didn’t realize the difference between the two. At any rate, problem solved! “mordentral” (well known plugin author) replied and suggested I was setting up steam wrong in the dev build. Turns out he was correct. I went back, refreshed my VS Project in the Editor, made sure all of my errors were cleared, and then did a new Dev Build. As mordentral pointed out, there is no need for the DLLs in the Dev Build. All I did was drop the steam_appid.txt in the root and it linked right up. I was able to connect with a team member over the internet from a 100 miles away. Documenting here so you guys can close the issue and to hopefully help out some others.