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Key & Compass presents:
The Most Valuable Card in the World
by DC and Mathbrush

The Most Valuable Card in the World is a Glulx interactive fiction game written with Inform 7 and is Β© 2026 by DC and Mathbrush. It was an entry in ParserComp 2026, placement to be determined.

In this game, you play as Talia Robin, an avid collector of Vigenere cards like almost everyone else you know. You soon learn that that the very rare and very valuable Toyotomi Typo was stolen from Jay Donovan, owner of Donovan's Cards. Trade up your cards and find out who did it! It's a quest!

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.


Map

The VIPGallery Donovan'sOffice Hallway MagicalEmporium 🧸πŸͺ€ 🎲🎎 Donovan'sCards πŸƒπŸƒ πŸƒπŸƒ Dollar Hutbathroom Dollar Hut(back) YourBedroom Dollar Hut(front) YourApartment(main) YourApartment(outside) Main St.≬ Avinand Brian Main St.≬ Brianand Chad End ofMainStreet Sketch-townDesert The MetroStation Karu 🍣 Sketch-town Metro(Hometown) Metro(Snacktown) Metro(Sketchtown) (to yourbathroom)

Walkthrough

Inescapable Room

> open eyes. (+1)

Dollar Hut Bathroom

> x me. i. x key.

> x wallet. x license. x bill.

> x toilet. x sink. x trash. x graffiti.

CAUTION 1: Searching trash with your fingers is deadly: you get an infection from a needle.

CAUTION 2: Flushing the toilet causes an overflow which reaches the wires which electrocute you.

> kick trash. (+2)

> take card. (+1)

> x card. (It's Glumpus, a common stupid card in very poor condition.)

> e.

Dollar Hut (inside, back of the store)

> x shelves. x bacon. x lamp.

CAUTION: You can't safely carry the bacon anywhere without it slipping out of your fingers and exploding. You need a shopping cart.

> s.

The Dollar Hut (inside, front of the store)

> x clerk. x belt. x binder. x cart.

> give key to clerk.

> push cart n.

Dollar Hut (inside, back of the store)

> put bag in cart. put lamp in cart.

> push cart s.

The Dollar Hut (inside, front of the store)

> buy bacon. (+1. He puts the bacon in its own bag and gives it to you.)

> buy lamp. (+1. He gives that too.)

> x bag.

> ask clerk about cards. (He's willing to trade a full-chrome Kryptangulor but wants to see what you have.)

> show card to clerk. (He laughs and passes.)

Make sure you leave the cart here and have returned the key to the clerk.

> s.

End of Main Street

> x station. (for subway)

> rub lamp. look in spout. take gum. (can't)

> w.

Main Street, between Brian Boulevard and Chad Court

> x crowd. x awning.

> n.

Donovan's Cards

> listen. (+1)

> x box.

> take new Glumpus.

> show chud. (+5. The trader agrees, but lets you keep both cards.)

> x portrait. (of Jay Donovan)

> ask trader about Jay. (He didn't come in today because of the theft.)

> ne.

Hallway

An employee stops you. VIPs and employees only.

> no.

> x employee.

> ask her about gallery.

> ask her about VIPs. ask her about Typo.

> ask her about herself.

> sw. s.

Main Street, between Brian Boulevard and Chad Court

> sit. show new Glumpus.

One kid suggests finding his little brother who loves Glumpus.

> ask kid about brother. (+2. Jesse, probably wearing a Glumpus hat.)

> w.

Main Street, Between Avin Avenue and Brian Boulevard

> x emporium. n.

The Magical Emporium

> x glint. (Limited Edition Zihuatanehawk valued at $500.)

> x toys.

> x bargain bin. find bin. (+2; items are $10 each)

> search bin. x kit. x putty.

> x completed set. (like a Japanese garden)

> x Lego box. x grove. x tea house.

> x pavilion. x terrace. x gazebo. x pond.

> x fish. (red herring)

> x kids. find Jesse. (+2; you find him)

> ask Jesse about Glumpus.

> show new to Jesse. (+5. He trades you a Sklarcrow XR for it.)

> x Crow. (worth $8)

> s.

Main Street, Between Avin Avenue and Brian Boulevard

> w. (Which building? 1 to 100.)

> 69. (heh, no)

> x license. (You live on Avin. Go home.)

> w. (Which building?)

> 52 (+1. And which apartment?)

> 67 (+1)

Your Apartment (outside)

> x door. (It's yellow.)

> open door. (locked)

> x mat. (features a cat named Menchie.)

> x cat.

> look under mat. take key. x key.

> x slot. look in slot.

> unlock door with key. (An alarm console wants a 6-digit number.)

> x license. (Your DOB is 01/24/08.)

> type 012408. (+2)

> w.

Your Apartment (main)

> close door.

> x pot. x fridge. x stove. x vent.

> x sink. x microwave. (bomb shelter)

> x couch.

> open microwave.

> put lamp in it.

> put bacon in microwave.

> close microwave. turn it on. (+5. KA-BOOM!)

> turn on fan.

> open microwave. (+2. The feculence is vented.)

> look in microwave. x lamp. take lamp.

> close microwave. thank it.

> turn off vent. thank it.

> sit on couch.

Time to use the lamp.

> rub lamp. (+1. A djinni emerges from the lamp.)

> x Djinni.

> ask Djinni about himself. (You have three wishes. Just WISH FOR something.)

> wish for something. (no, you did infinite wishes already.)

> wish for something. (Wealth? He conjures a chest.)

> x chest. open it. look in chest.

> z. (+1)

Your command is ignored. Instead, you take the Snacktown gift and the Metro pass. Then the chest vanishes.

> wish for something. (You can now fly!)

> z. (+1)

Your command is ignored again. Instead, you levitate, then descend. You can't really fly, just levitate for a turn.)

> wish for something.

The Djinni decides those last two wishes only count as half-wishes, so you have two left for later. Say "make a wish" when you want him. The Djinni re-enters the lamp.

> x gift card. x pass.

> n.

Your Bedroom

> x posters. look behind poster. x safe.

> x desk. open drawer. look in it. take safe key.

> x bench. look under bench. x window.

> unlock safe with safe key.

> look in safe. (+2)

> take Emporium card. x it.

> take badge. x it.

> x sticker. take it. (You put it on the back of the badge.)

> x bed. look under it. make it.

> e. (no, ignore your bathroom)

> s. e.

Your Apartment (outside)

> close door. lock it.

> e. n.

The Magical Emporium

> fly. x completed Lego. (You briefly see a minifigure before landing.)

> fly. take minifigure. (+2)

> x minifigure. x visor.

> x cashier. show Emporium card to her.

> search bin. take putty and kit.

> buy putty.

> give Emporium card to cashier. (+1)

> buy kit.

> give Emporium card to cashier. (+1)

> s. e. e. s.

The Metro Station

> x turnstile. (need a reader)

> swipe pass. (+1)

> s. (You enter a train.)

Metro (Hometown)

The Djinni tells you to use "east" or "west" to control where the train is.

> x map. (Next stop east is Snacktown, and the one past there is Sketchtown.)

> x woman. x binder. (She wants a Sklarcrow XR card.)

> show Crow to woman. (She offers to trade a Klipspringer XR, worth $15. Trade?)

> yes. (+5.)

> x Klip. thank woman.

> ask her about metro. (She'll be here as long as she can.)

> e. n.

Karu - Revolving Sushi Bar

> x monitor. ($4 per plate, menu options, counter shows "0 of 5".)

> touch monitor.

> x slot. ("Return plates here.")

> x table. x belt. x plate.

With every plate you take, you automatically eat all the sushi on it, leaving you with an empty plate.

> take plate. put plate in slot. ("1 of 5")

> take plate. put plate in slot. ("2 of 5")

> take plate. put plate in slot. ("3 of 5")

> take plate.

Masked men shout that they're here for your cards! Djinni recommends saving your game; he can't help with this one.

> save

> put cards on belt. (+2)

> put plate in slot. ("4 of 5")

> z. take cards.

> take plate. put plate in slot. (+1; you get a prize ball)

> open ball. look in it.

> x whistle. take it.

> x monitor. ("5 of 5")

> s. (You automatically use your Snacktown gift card.)

Metro (Snacktown)

> e.

Metro (Sketchtown)

> ask woman about Sketchtown.

> n.

Sketchtown

> n. (Not without a destination in mind.)

> x sand. blow whistle. (loud and annoying)

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

Donovan's Cards

> x traders. listen.

Note that customers who compliment traders get better deals.

> compliment trader.

> show Klip to trader. (They offer a $30 Sorasaurus B&W card. Want it?)

> yes. (+5)

> x Sora.

> s. e. n.

The Dollar Hut (inside, front of the store)

> ask employee about cards.

> show Sora. (He's willing to trade. Are you?)

> yes. (+5)

> x Krypt.

> s. w.

Main Street, between Brian Boulevard and Chad Court

> show Krypt. (You may sit now.)

> sit. (+5; you now have a $250 Mystiq card.)

> x Mystiq.

Head back home again.

> w. w. w. w.

Your Apartment (main)

There's new mail on the floor.

> take mail. x mail. (ask about big bonus promotion at Magical Emporium)

> open kit. x pieces. x glue. x tweezers. x decals. x folded.

> make model. (not now, maybe later)

Actually, not ever, but you can use some of the kit right now by upgrading your ID badge with the Vigenere logo.

> fill pot. (done)

> touch pot. (cold)

> put pot on stove. turn on stove.

> touch pot. turn off stove.

> put decals in pot.

> take logo with tweezers.

> put logo on id. (+3)

> e.

Your Apartment (main)

The game explicitly tells you that you can leave the door open and unlocked without any penalty, but I still prefer to lock it, okay?

> close door. lock it.

> e. n.

The Magical Emporium

> show Mystiq to woman. (She loves it, wants it, but won't trade a $500 card for it.)

> ask woman about big bonus promotion.

> ask woman for job application. (+1)

> x gift card.

Incidentally, the Lego set is $800. The gift card is not enough to buy it.

> show Mystiq to woman. (She'll trade the Hawk for both the Mystiq and your gift card. Deal?)

> yes. (+5)

> x Hawk.

> s. e. n. ne.

Hallway

"Do you work for any of the card companies?"

> yes

> show ID to employee. (+2)

> ne.

The VIP Gallery

Note how the guard reacts to loud noises.

> x guard. x key. x guests. x cards.

> show Hawk to guests. (They're not interested.)

> sw.

Hallway

> blow whistle. (You hear a rumbling from the VIP gallery.)

> z. (The guard appears, shouts "Knock it off!", then walks back. Note he has the same tattoo as one of the robbers at the sushi place!)

> ask employee about guard. (Something wrong with him.)

> open tin. x putty.

This next bit is timed. You want to get a mold of the guard's key before he can stop you.

> blow whistle. ne.

The VIP Gallery

> put guard's key in putty. (+2)

> sw.

Hallway

> put glue in mold. (+5)

> take glue key. x it.

> sw.

Donovan's Cards

> unlock office door with glue key. (+1)

> nw.

Donovan's Office

> x desk. x device. take GPS.

> x fixtures. x safe.

> look under desk.

> make a wish. (+5; the safe is unlocked)

> open safe.

> x lottery ticket.

> enter 34, 59, 20, 106, 36, 52 in GPS

The location is far to the east. By the way, these coordinates are a Breaking Bad reference, where Walter White buried his barrels of money. In the real world, it's the Albuquerque Studios, where Breaking Bad was filmed.

> se. s. e. s. s. e. e. n.

Sketchtown

> enter 34, 59, 20, 106, 36, 52 in GPS.

> go to GPS location. (+2)

Sketchtown Desert (at 34Β°59"20.0"N 106Β°36"52.0"W)

> save

> x sand.

> x holder. (+2. It's the other Typo. And you've triggered a sensor.)

> x Typo. x men. z. ("Any last words?")

> make a wish. (+5)

The cards animate! Run!

> s.

Sketchtown Desert (south edge)

The Lego Spaceman has also animated.

> s. (The Toyotomi directs a blow at your head. WHUMP.)

>> SPACE

The Spaceman intercepted the blow.

> s.

Metro (Sketchtown)

Everyone but the Toyotomi follow you; it doesn't have a Metro pass. You must run directly into the Dollar Hut bathroom.

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

Dollar Hut Bathroom

> save

> fly. flush toilet. (*YOU HAVE WON*)

>> SPACE

Will you ACCEPT the deal or KEEP your Glumpus? Both are good endings.

> acceptorkeep

*** Stay fresh, cheese bags! ***


Extras

Characters

People:

Creatures:

Mentioned:


Credits

This is the response to ABOUT:

The Most Valuable Card in the World is a tribute to my wonderful daughter Talia, whose idea to upgrade a nearly worthless card, one trade at a time, up to a highly valuable card was the inspiration for this story.

This game is also peppered (pebered?) with inside jokes and shared memories...but hopefully in a way that remains accessible to you even if you are not my offspring.

The game was coded masterfully by Brian Rushton, the most extraordinary and enjoyable creative collaborator imaginable. Honestly, you can't imagine it...you'd simply have to be lucky enough to work with him to realize that his talents, positive energy, and persistence are limitless. What a godsend. My only concern is that he might delete this acknowledgment out of humility.

DC (yours truly) wrote the game itself - the story, puzzles, descriptions, responses, dialogue, and all other text. So don't let Brian take credit for any of that, except the parts that were written poorly.

Many thanks to our beta testers: Steve Geller, Steven Cole, Drew Cook, Ray Huang, Nils Fagerburg, Jade, Robert Eggleston, Mike Russo, DemonApologist, and Talia herself.

Cover art is by Talia.

No AI was used to create any part of this game, including the cover art.


Endings


Inventory

Cards (Vigenere)

Important: When the masked men enter Karu, put your cards onto the conveyor belt so the men don't steal them from you. Make sure to take your cards back when they return back to your table.

For fun: Show your current card to everyone you've already traded with for their reactions. It's like you're the Hero of the Beach.

Keys
Money (and gift cards)
Other items

Score

This is the response to SCORE:

You have so far scored N out of a possible 100, in T turns.

Points are awarded as follows:


Thank You to my Patreon supporters

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