In this sparse iteration of the Locked Door series, you still need to unlock a locked door. Introducing an ingot, scales, a red herring, and a doorknob.
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.
Bob is in the White Room. He has an iron key, but he'd really like an apple.
Rex is a dog who follows you everywhere.
Inventory
a crowbar. It's in the shed interior.
In the warehouse, pry the crate with the crowbar.
a flashlight. It's in the crate in the warehouse; pry the crate with the crowbar.
Turn the flashlight on to see in the cavernous cavern, the game's only unlit room.
Note: The flashlight's power won't run out.
a step ladder. It's in the storage closet.
In the library, stand on the ladder, examine the shelf, then take the scrap of paper from the shelf.
a sledgehammer. It's in the storage closet.
In the narrow hallway, hit the flimsy door with the hammer to open it.
a plunger. It's in the bathroom.
Plunge the toilet with the plunger to unclog it.
a scrap of paper. It's on the high shelf in the library; see ladder.
Read it; it always says 0451. In the tidy office, spin the dial to 0451 to open the safe.
a grabber. It's in the green room.
In the cavernous chamber, grab the brass key with the grabber.
a brass key. It's in the crack in the cavernous chamber. Grab the brass key with the grabber.
In the white room, unlock the office door with the brass key.
NEW: an ingot. It's in the locked safe in the tidy office. Spin the dial to 0451 to unlock the safe; this number is on the scrap of paper.
In the yellow room, put the ingot on the balances to open a secret passage in the black room.
NEW: a red herring. It's in the sewer.
You don't need the herring.
an apple. It's in the orchard.
In the white room, give the apple to Bob to make him friendly.
NEW: a doorknob. It's in the door factory.
In the white room, after unlocking the wooden door with the iron key, you can open the wooden door if you have the doorknob. You automatically attach the doorknob to the door as part of your attempt to open it.
an iron key. Bob, in the white room, has it.
After making Bob friendly (see apple), ask Bob for the key. He gives it to you. Unlock the wooden door with the iron key.
a trophy. It's in the case in the gray room.
Open the case. Take the trophy to win the game.
Score
The response to SCORE is:
You have so far scored N out of a possible 9, in T turns.
