Surprisingly Roblox does have a large 18+ community and I'm one of them. One of my favourite games I like to play on there when I have time is Grand Continental Railways (or GCR for short). The game is UK based and free driving. It has around 15 different locos including from the Class 142, 67, 68, 325, 507 and 52. You can select the number of the train you want as well (if you type in 66789 when selecting the Class 66 you get a BR blue variant) The graphics are surprisingly good for a Roblox game and the sounds are amazing. The controls are smooth and functional. Although the map is quite small it still is enjoyable and the game is expanding fast. There is also multiple funny references all over the map (even a nuke!) The owner is funny and has a YouTube channel here https://youtube.com/c/themodster I think the game is nice, although it isn't as realistic or graphically advanced as TSW2 it still pretty good! You can find the game here https://ro.blox.com/Ebh5?pid=share&...web_dp=https://www.roblox.com/games/361547354
