Hotline (HTL) was also one Commodore 64 cracker
group, based in Holland
, founded in August 1986. It was led by Sledgehammer
Their first crack was Donkey Kong, from Ocean. After that, they made tons of cracks, with more and more beautiful intros in them!
(Information mostly from Sledgehammer's interview in ILLEGAL 'zine, Issue 22, October 1987.)