- 'Becca in Outlaw Cave' is an unfinished game written by Jean Craighead George. You can either follow the instructions in the user manual to finish it off as the author intended or finish it off yourself however you see fit.
- 'Clever Catacombs' is a finished game by Adventure Master author Christopher Chance. As a sample game, I thought it would be easy to complete, but I've just spent a couple of nights and the whole of a long weekend trying to beat it. It's one of the hardest, most devious games that I've ever played, but I think this is primarily a combination of bad game design, lots of guess-the-phrase (not guess-the-verb, as you don't define verbs, only phrases) and shortcomings of the Adventure Master system. (I've submitted a map and solution for those that would like to try it.)
- 'Wild Trails' is another unfinished game by Jean Craighead George. It is playable, but you are encouraged to finish it off yourself.
For the Apple II, I haven't found any.
For the Atari 8-bit, I've only found two (and know of one unreleased game):
- 'A Christmas Eve Nightmare' by Dan R Johnson, published by the Page 6 public domain library.
- 'The Wizard's Cottage' by Dan R Johnson, published by BRE software and also on DGS PD library disk #96.
- 'Pirate's Booty' by Steven Bradbury, but this has never been released and I no longer have a copy of it.
- 'Dracula's Castle' by Mario Müller
- 'Ghostbusters: Basic Training' by David Zeiss.