I went to play this again and it seems like enemies are spawning in the intro cutscene, for some reason? This makes the knights hostile, and pops up some random extra enemies in the castle proper when the cutscenes end.
I noticed this too, I moved the Pk3 file and opened it up in UZdoom instead as a test and it seems to work properly there. This project may need a bit of a repackage to iron out whatever is going on here.
