Thank you for bringing this to my attention. I will put a warning at the end of each game's description so that others are aware! I certainly wasn't! I've tested on Sierra and Catalina but I'm loathe to 'upgrade' to Big Sur because things do end up being broken for a while :O
I hope you can get the game working, and if you do, I'd appreciate a link to what worked for you! In the meantime, yes, it's a LOT easier to get Speccy games working! Thanks for giving Last Train a go! :D
QS =D