An expanded and beefed up version of CH6.6, featuring the same tough-but-fun gameplay and an additional, unimaginably tough extra mode.
If you're looking to access Hell Mode, enter in "heckmodeomgz" against the first opponent, and if you're looking to suffer through Heaven Mode, enter in "ifailedthem".
Speaking of Heaven Mode, Jesus Tapdancing Christ, 83457, you really cranked up the difficulty on that.
There's only 91 people who beat the Cyber Knight and earned the corresponding medal, and considering the medal API times out if you take too long (half an hour IIRC), I suspect you've had to manually award a good portion of them.
EDIT: That number's up to 92, now. Gonna put the screen recording up on my personal YouTube channel sometime later.