Can't believe Runescape private server are still a thing after 18 years. This is what got me into programming. I remember working with the first version back in early 2006 I believe it was called winterlove. You couldn't even play multiplayer. Then someone got multiplayer to work, I think that was called blakescape, then there was cheezscape and whitescape which became the popular versions to use because they came with a lot of content like combat ect.
All of the coding I did was done using notepad on Windows lol.
I remember when the major version this server is based on 470-500+ versions which is when they updated the graphics. We spent days trying to be the first one to get a working server and client. You had to mod the client and walk around the game to collect map data to be able to load the map on private server.
The most fun times I had programing to this day.