Black Thorne (bthorne_codes.txt)

Level 1: No code (you start at Level 1 when you choose New Game).
Level 2: FBWC
Level 3: QP7R
Level 4: WJTV
Level 5: RRYB
Level 6: ZS9P
Level 7: XJSN
Level 8: CGDM
Level 9: TJ1F
Level 10: GSG3
Level 11: BMHS
Level 12: Y4DJ
Level 13: HCKD
Level 14: NRLF
Level 15: J6BZ
Level 16: MJXG
Level 17: K3CH (Sarlac)