Invincibility:
Note: This procedure involves editing a game file; create a backup before proceeding. Use a text editor to edit the “game.erg” file in the “data” folder in the game folder. Remove the hyphen “-” character from the line:

“-BO2 Kain Debug Flagskain’s invulnerable”=1

it should appear as:

“BO2 Kain Debug Flagskain’s invulnerable”=1