I learned of the Apple IIGS HyperCard Eamon by reading old copies of GEnie Lamp; there was a discussion between a staff writer, Darrel Raines, and the EAG's Tom Zuchowski concerning the former's attempt to bring Eamon to the IIGS. Over this discussion, the HyperCard Eamon was held up as the paradigm of how not to port Eamon.
I'd presumed that Darrel Raines grew frustrated and had ultimately abandoned his attempt... and this indeed appears to be the case. But he also left behind an artifact, his "tech demo" of what his envisioned port would look like.
Inasmuch as the user's only option is to continually hit the spacebar (it is a mere demo, after all), I thought that rather than making the reader track down the file, extract the folder from the .BXY file, convert the folder to a .PO file, mount the .PO file in the IIGS emulator... (you get the picture), I'd post the entire tour here. (The reader can hit the spacebar at appointed times for effect as he or she scrolls down, of course.)
For one, Eamon IIGS has the coolest dragon ever to grace an Eamon splash screen (though that of the the Atari 800 port certainly gives it a run for its money). It's worth the price of admission for that alone. (Oh, and click on the Atari 800 link. Really. And bring your snorkel because you'll be swimming in awesome.)
Eamon IIGS appears intended as a more modest effort than Hypercard Eamon, its graphical capabilities limited to a discrete window. The demo also sees the adventurer walking blindly into a cave in true Eamon fashion. Because there's nothing a Free Adventurer likes more than walking blindly into a cave.
And the adventurer immediately finds a unicorn playing a bit of a "white rabbit" role, luring the player deeper. Why unicorns seem so popular in Eamon ports is beyond me (cf. Eamon Pro). Why they hang out in caves is even less clear. Then again, why Free Adventurers hang out in caves is itself obscure.
Unicorns and vampires in one cave!?! It's like a mythological creature overdose! Only with the inclusion of ninjas and an Archie Shepp soundtrack could this cave get any cooler. Sadly, the demo is drawing to a close.
And a goblin from the Rankin/Bass production of The Hobbit (points for style!) ends the demo on a cliffhanger, saving the adventurer from the vampire and entreating him or her on a quest of some sort. Perhaps to wrangle that runaway unicorn? The world may never know.
So here is the cosmic conundrum: on the one hand we have HyperCard Eamon, which is complete yet entirely broken, and on the other we have Eamon IIGS, which works as intended but is utterly incomplete. I don't know a lick about programming a IIGS (I don't know a lick about programming in general, either) but perhaps this is an indication that it was really difficult? To go further would be to needlessly speculate. There's your tour.
Unrelated note: "Tenement of the Damned" really exists, I promise. Frank Black wanted to put a layer of polish on it before stamping it and releasing it into the wild.
I make no warranties, as the site is not working for me at the moment, but the source of the file, titled "eamon2.gs.bxy," is here. Wade Clarke suggests in the comments that the site whence I discovered the file may be down for some time; for those wishing to tinker with the file, it has a home for the time being at http://www.filedropper.com/eamon2gs.