Legacy of Kain: Blood Omen 2 Cheats (PC)

At the main menu, quickly press the buttons for: block, auto face, dark gift menu, first
person look, action, use dark gift, and suck blood.

This requires editing a game file, so create a backup copy of the file before starting.
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

  so it now appears as: 

  "BO2 Kain Debug Flagskain's invulnerable"=1