May have been re-releases. I had a lot of the original games with feelies and (effectively) anti-pirating code wheels and the like. I think I have one of the CD re-releases and I play for a bit now and then with a Z interpreter.
Yes rereleases as I stated above. ( or meant to ) I recall my father being quite excited when he saw them. Not sure what games he played first on the Commodore, if any.
They amused me for a time at 9-10, then later at maybe 14-15 or so I got into them again playing on a Palm VIIx with a folding Stowaway keyboard. I also read through HHGTTG on that same device.
I have fond memories of some z-machine interpreter on the Palm that I found easier to play with than anything on my desktop computer. There were lots of shortcut buttons and thanks to the stylus it was still easy to use those (vs a touchscreen using ony fingers where you need huge buttons to hit). You could also tap any word in the output to bring up a context menu of actions (e.g. to examine or pick up objects mentioned in room descriptions) and that list of actions was a combination of a configurable global list and a game-specific list you could add actions to. Could play through entire games and barely ever have to type anything. Had a folding keyboard, but no memory of using that for interactive fiction.
The re releases I played they were under "hint" or "hints" or "help" or something.
There was an are you sure / really sure admonishment, then breadcrumb bit by bit hints towards solution.