CO-OP with toxicroach | Half Life: Opposing Force (PC)

It took awhile to figure out but after following this guide, downloading the SteamCMD Server, and double checking with a video on PortForwarding… toxicroach and I were able to play the Half Life: Opposing Forces Story Chapters together with Sven CO-OP. This acts as a multiplayer server so quick saves wont work, your health regenerates with each death, your in game character model/weapons might be different than what was intended, players reconnect with every checkpoint/new level, and glitching out in a level would mean restarting the entire chapter over again. But aside from that, it was actually pretty awesome.