Recently I found my old copy of Sacred, and I tried to go online with it. Obviously, the game is really old, and now the master server (called Lobby server) is closed. Searching more info, I found that Luigi made some searches about the protocol and the tincat2.dll file.
I tried to decompile the files and tap via wireshark, but I'm at a stale point. I recently discovered the Tincat_Scramble paper, tried on some packets but still is binary, I cannot decode it.
Have you some documentation on TinCat protocol? Having a full lobby server would be a dream, but at least making a direct-ip utility that fakes a lobby would at least be fantastic