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Key & Compass presents:
Unknown Dimension
by Garry Francis

Unknown Dimension is a Z-machine interactive fiction game written with Inform 6 and is © 2025 by Garry Francis. This game is an adaptation of the 1987 Italian adventure Dimensione Sconosciuta by Bonaventura Di Bello, written using The Quill, then later rewritten as Amos Newton: Incubo. See credits for more details.

In this sci-fi rescue adventure, you play as Amos Newton, an archaeology student. Your friend, Professor Baumbeker, rings you up. He babbles excitedly that the strange Incan sphere he found in Peru is showing him an unknown dimension. But in his lab, you only find the sphere. Not him. As you touch the sphere, you see a vision of the professor before you're teleported to the dimension yourself. And it's pitch dark.

This solution is by David Welbourn, and is based on Release 1 of the game.

SPOILERS AHEAD. Reading a walkthrough prematurely can sometimes diminish one's enjoyment of an interactive fiction game. Please make an honest effort to play the game before reading this walkthrough.


Maps

Map 1: Caves and watery labyrinth

Labyrinth(medallion) Labyrinth Labyrinth Labyrinth East-WestTunnel NaturalCavity End ofTunnel Labyrinth Labyrinth Labyrinth Start ofLongTunnel DampPassage Entranceto DarkTunnel HugeCavern RockFace (path ofwaterfall)

Map 2: Outdoors

InsideShack HugeCavern Labyrinth Middle ofClearing SmallPlateau RockFace Entranceto DarkTunnel Sea of Green Grassand Flowers Bottomof Well DirtRoad LongDustyPath Path AlongRock Face daffodils poppies daisies End ofDirt Road LargeClearing East-WestPath End ofPath SmallMeadow PavedAvenue MuddyCorridor Foot ofMonument Sanctuary d touch mirror (hole) u

Map 3: Tunnels and secret places

East-WestTunnel Start ofLongTunnel Bottomof Well Middle ofClearing LongTunnel Top ofStoneStaircase SmallMeadow DarkCorridor DarkCorridor MuddyCorridor DeepPit Foot ofMonument End ofCorridor SacredChamber Sanctuary u u u d d d touchmirror (hole) (path ofwaterfall)

Walkthrough

Darkness / Huge Cavern

Your torch has very little battery life left to it. Don't waste time examining the boulder or stalactites.

> i. turn on torch.

> x chest. (has triangular hole)

> n. n. w.

East-West Tunnel

> take glowing. x shell.

> break shell. (You now have a luminescent sponge providing light.)

> x shell. (scoop-shaped with sharp edge)

> x sponge.

> e. e.

End of Tunnel

> x door. e.

Labyrinth

The door slams shut behind you. When I played this part, I blundered through here and luckily found the medallion and the exit.

Much later, I mapped the labyrinth using the drop-different-objects technique to make sure I didn't miss anything. I hadn't. The medallion is the labyrinth's only prize.

> save

> n. e. e. e.

There should be a silver medallion here. If it's not, perhaps it's randomly-placed. If that's the case, use map 1 to help you traverse the entire labyrinth.

> take medallion. x it. wear it.

> s. s.

Entrance to Dark Tunnel

In the hot dry air, your sponge dries up into dust and blown out of your hands.

> w.

Sea of Green Grass and Flowers (daffodils)

This is another maze, but much smaller; see map 2.

> x grass. x flowers. smell daffodils.

> s.

Sea of Green Grass and Flowers (daisies)

> x flowers. smell daisies.

> n.

Sea of Green Grass and Flowers (poppies)

> x flowers. smell poppies.

> dig. (using the shell)

> take bundle. x it. open it.

> x raincoat. x umbrella.

> w. w. w. w. n.

Rock Face

This is the other side of the same boulder you saw in the game's first location.

> x boulder.

> s. w. n.

Small Plateau

> x farmer. x rifle. x matches. x shack.

> talk to farmer. (He's upset about a thief)

> ask farmer about thief.

> ask farmer about pipe.

> ask farmer about wife.

> ask farmer about himself.

> ask farmer about professor.

> ask farmer about medallion.

> ask farmer about cave.

> ask farmer about well.

> ask farmer about rope.

> ask farmer about meadow.

> ask farmer about yellow substance.

> ask farmer about rifle.

> ask farmer about matches.

> ask farmer for matches. (He gives them.)

> count matches. (plenty)

> w.

Middle of Clearing

> x well. x roof.

> e. s. s.

End of Dirt Road

> x tree. x tractor. search it.

> x oil can. take it.

> e.

Large Clearing

CAUTION: Touching the yellow substance is fatal.

> x yellow. smell it.

> s.

Small Meadow

CAUTION: Touching the rope with your bare hands is fatal.

> x tree. (The rope starts moving.)

> x rope. (covered in yellow substance)

> x hole.

A man crawls out and dies. He's now a mummified corpse.

> x corpse. x paper. (It's a drawing of a man next to a well with an umbrella.)

You dare not take or touch the paper either.

> take match. light match. burn corpse.

> x corpse. search it. take pipe. x it.

> n. e. e. s. s.

Foot of Monument

> x bowl. take it.

> x monument. climb it. (no: need a ladder)

There is a ladder in the game, but if you climb it here, you find nothing at the top of the monument.

Return to the farmer.

> n. n. w. w. w. n. n

Small Plateau

> give pipe to farmer.

> give matches to farmer. (You're now welcome to enter his shack.)

> enter shackorn.

Inside Shack

> x planks. x dust. x furniture.

> x ladder. x boots. x trunk. open trunk.

> x gloves. x batteries.

> take batteries. put batteries in torch.

> take boots. wear boots.

> take gloves. wear gloves.

> wear raincoat.

As should be obvious now, all this protective gear is for protecting you from the yellow substance, not from rain.

> s. s. s. e. s.

Small Meadow

With the gloves on:

> untie rope. take rope.

For what it's worth, this is when I mapped the labyrinth, but I'm not going to make you do that.

> n. w. n. n. w.

Middle of Clearing

> tie rope to well. turn on torch.

> d.

Bottom of Well

> n.

Start of Long Tunnel

> x waterfall.

> s. s.

Long Tunnel

> x outlet. x staircase.

> u.

Top of Stone Staircase

> x door. x niche. x lever.

> pull lever with umbrella. (door opens)

> s. (Again, the door slams shut behind you.)

Dark Corridor (by door)

> e.

Dark Corridor (near dripping yellow)

You better be wearing the boots and raincoat.

> x pool. x ceiling.

> open umbrella. e.

Muddy Corridor

This location is directly below the meadow.

> s.

End of Corridor

> x symbols. x carvings. x depression.

> remove medallion. put it in depression. (An east exit opens.)

> wear medallion.

> e.

Sacred Chamber

> x bar. take it.

> x pit. x hieroglyphs.

> d. (no: need a ladder)

> e.

Sanctuary

> x statue. x base. (has scratches)

> x mirror. (ripples)

> x sphere. (like the one the prof had)

> turn statue. x bomb.

> oil spring. take bomb.

> touch mirror.

Foot of Monument

> close umbrella. turn off torch.

> n. n. w. w. w. n. e. n.

Rock Face

> drop bomb. push trigger. s.

Long Dusty Path

> z. z. n.

Rock Face

> x debris. turn on torch.

> n.

Huge Cavern

Just leave the torch on from now on. Trust that the new batteries will last.

> put bar in hole. x liquid. fill bowl.

> s. s. w. n.

Small Plateau

> ask farmer about chest.

> show liquid to farmer.

> ask farmer about tractor.

> ask farmer about monument.

> n.

Inside Shack

> take ladder.

> s. s. e. n. n. n. n. w.

East-West Tunnel

> throw ladder (over the waterfall).

> e. s. s. s. s. w. n. w. d. n.

Start of Long Tunnel

Yes, yes, you climbed down the rope while holding a bowl of green liquid in your mouth. You are just that amazing.

> take ladder.

> s. s. u.

Top of Stone Staircase

> pull lever with umbrella.

> s.

Dark Corridor

> open umbrella.

> e. e. s. e.

Sacred Chamber

> drop ladder. d.

Deep Pit

> x professor. give bowl to him.

> x him. talk to him.

> u. e.

Sanctuary

> touch sphere.

*** You have won ***


Extras

Characters

Mentioned:


Credits

This is the response to ABOUT:

This game is an adaptation of the Italian adventure 'Dimensione Sconosciuta' by Bonaventura Di Bello. This was his first game. It was originally written using The Quill for the ZX Spectrum and circulated amongst his friends. He then entered it in a competition hosted by Arcadia S.r.l. in the magazine 'Load'n'Run'. He wasn't allowed to enter, but the game was published on the cover tape of 'Load'n'Run', no. 37, April 1987 for the ZX Spectrum.

The game was later rewritten as 'Amos Newton: Incubo' using The Quill and Illustrator and published by Edizioni Hobby S.r.l. on the cover tape of 'Explorer', no. 8, June 1987 for the Commodore 64 and MSX.

The data was extracted from the C64 version using UnQuill, translated to English and rewritten for a modern audience with the original author's permission. The new version includes many enhancements that weren't in either of the original versions. The coding was done using Inform 6 and the PunyInform library.

Original concept, game design and coding by Bonaventura Di Bello.
English translation, game redesign and coding by Garry Francis.
Play testing by Charles Moore Jr, Gianluca Girelli, Pablo Maria Martinez Merino and Robert Eggleston.
Special thanks to Gianluca Girelli for ideas and feedback during the redesign.


Endings


Inventory

Items are listed in the order they're acquired in this walkthrough.


XYZZY

This is the response to XYZZY, PLUGH, PLOVER, or YOHO:

You have a vision of Professor Baumbeker. [either] He looks horribly emaciated, almost non-human. [or] He looks weak and frail, but he's smiling. [as appropriate] Then the vision fades.


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