How many shadows do you have to kill? and where are they all? I've killed the 2 in the biplane room, and the one in the portcullis room by the castle exit. I've also killed the two which appear on the hillside, between the ghost ship and the "sealed door" which opens onto the open ground outside the coliseum entrence, but they seem to reappear if you leave and re-enter the area.

there are only 4. Two in the biplane room, one in the hall, one in the bridge room. And it's mission 9. Mission 10 doesn't have any enemies.

There are none in 10