DAAD: Old Adventure creation System brought back to life (DAAD)
AWS: http://davbucci.chez-alice.fr/index.php?argument=varie/two_days/two_days.inc (well, this is a new AWS game but it’ll help set the stage before you start delving into Italian docs–the language itself appears to be English-based, though)
Scott Adams: Adventshark
The fact that Dialog games can be loaded and played at all on a C64 is interesting, but… yeah. Notably, the standard lib is so big that there’s no chance of making a single-file-load adventure, which can speed things up. With ZIL and (base) Inform, that’s still a distinct possibility if your game stays compact enough.