Secret Adventure Mode
The Creatures Secret Adventure Mode was discovered by David Wood and reported by him in response to a question posted to alt.games.creatures on 25 February 1998:
From: regen Subject: drowned god Newsgroups: alt.games.creatures Date: 1998/02/25 Help! Does anyone know how to get back into the sun pyramid, in the Chesed time period? I went out before I finished my task and know there is a large sphere blocking the entrance. I don't want to have to start the game all over from the beginning. Thanks in advance.
David's solution can be found here, but it must be read right to the end.
The adventure mode proved to be a very popular topic on the newsgroup, and it was subsequently reported to be present in both Creatures 2 and Creatures 3. Rumours that Creature Labs intended to expand the adventure mode into a separate game were deemed to be confirmed when details of Project Loci leaked - unfortunately, the company was liquidated before the game could be completed.
A prototype SAM is documented in Steve Grand's programming diary, in the week commencing 3/5/94. It consisted of a possible sequence of events that might form a storyline. [1] Thankfully, the concept evolved to the level of complexity that we see today in the Creatures series.
A similar project for Creatures 2 was Dragon Nornior by jcarrcwalk.
Melloweh could be considered to be an adventure mode for the Creatures Evolution Engine, albeit not involving norns.