1. Select a mission.
2. Once game starts, hit esc or back to bring up the menu.
3. Type the word “honorless” in the menu. There is no text bar or anything, just type it in the menu itself. A message will then pop up and say achievements can’t be unlocked when cheating.
4. Exit the menu, and then hold “insert” and the number. 1 = hyato, 2 = yuki, 3 = mugen, 4 = aiko, and 5 = takuma
5. and proceed to play out the level however you see fit.