With the 313 and other like 314 you should be able to become a gard at the back of train and do Gard duty’s
I think after a couple of runs it would tire very quickly for me personally. Only so many times I can walk to one door, open it, close it, do a few ticket checks, walk to another door and repeat and rinse.
What would the player be doing exactly? Besides opening the doors and imitating a ticket check (without the ability to issue tickets or fines etc) it seems there would be little to actually do! Going back a few years I did the trolley service on Cardiff to Birmingham and literally I walked the train five times on the way there and four on the way back. So in about five hours I moved nine times. Hardly a thrilling experience