Thanks for the feedback. I haven't been able to try Roguecraft on a MiSTer. 103 is too little memory. Are you trying to run it from wb console? Or do you have multiple floppy drives configured? I think each floppy drive connect takes a little extra memory, and RC uses a lot of chip mem atm. 🙂
It happens on Kickstart 1.2/1.3 when at least 2 floppies are connected. Kickstart 3.1 doesn't have this issue, while Amigas with 1MB chip can run the game with extra drives connected on 1.2/1.3.