I know Victor’s ATTACK extension was never on the extension page due to being a different license. I have a copy of it from way back though.
Is this extension still available for authors to use, and will it be updated, or was it withdrawn since it basically is the game Kerkerkruip?
The latest versions are accessible at Github: github.com/i7/ATTACK
Note that it’s not yet updated for the new Inform, though.
But we definitely keep it separate from Kerkerkruip; Kerkerkruip contains rules that override some of Attack’s rules, for instance.
Also, I’m afraid the Attack documentation is quite out of date at the moment.