I can confirm now that games are separated by server even on the same region.
Reproduce:
- created a game on .188 server.
- keep relaunching d2r until you get on the .88 server
- You cannot find the game you made from the .188, you can even make the same game name on the .88 server
command to check the server you are connected to (from a post above) “netstat -anob | Select-String -Pattern D2R.exe -Context 1,0 | findstr :443 | findstr ESTABLISHED”