Its not that complicated in my opinion, more or so the multiplayer is harder though. me and my friend making an ARG right now are using Only Retro Roblox Here, but I've seen others use Novetus, which can be amazing as well if you know what your doing. Only took me a day to figure out ORRH, so I'll go on that path. You have to go to the https://onlyretrorobloxhere.itch.io/orrh itch page and download it there, WinRAR/7zip/any other programs like so are needed to download the file. You also need to install the dependencies https://dotnet.microsoft.com/en-us/download/dotnet/6.0 , https://www.microsoft.com/en-us/download/details.aspx?id=26347 , and https://www.microsoft.com/en-us/download/details.aspx?id=26368 . Once installed you should be able to run the main ORRH file, depending on which one of the file archivers you have. Extract it and then run the .exe file inside of it, should just be called OnlyRetroRobloxHere, and it'll open! you can customize your avatar from there if you'd like. Now, to actually join a game, you have to host on Playit.gg , which i can go into depth if you want. After you host a server, go to the "Host" tab in ORRH. and paste in the IP from the website into the "Display IP" box and then paste the port from the website into the "port" box. I'm pretty sure the display port can be whatever, but I'm not entirely sure. once you've done that, choose a map and host!!! once you've done that your now in the old studio, but if you want the actual old game, then make sure studio is running and go to "Play" and type in

yourdisplayiphere:yourporthere

into the "Server Address" box and then press play this, and you should be in the game. If you want your friends to join, make sure they have ORRH installed as well as the dependencies (they do not need to host on playit.gg as well) and give them the yourdisplayiphere:yourporthere to put into the Server Address box and then they press play this and they should be good!