Master Lock

Master Lock was a program used to protect your software creations.
Claimed that your software then could not be copied by Nibblers, Disk Maker, Copy II, Ultra Byte or Fast Hackem. So does anyone know what type of protection this program used or how it worked? Sold by MegaSoft.

masterlock

Bounty Bob Strikes Back

Bounty Bob Strikes Back by Big Five Software.

This title is know in the C64 world as one of the hardest to copy disk out there.

bountybobstrikesback

The only thing thought I knew of that could copy it was Jim Drew’s SuperCard+ and a custom copier.(Version 3 of the Supercard-Plus.)

There are also different version of this disk.
It is also reported that Big Five software never used mass duplicators.

Jim Drew reports that this used completely aligned half-tracks.

C64preservation.com reports that most tracks are in custom GCR format offset 1/2 on each halftrack. Lower-grade version of Spiradisc-like protection from Apple II