A live TAGG mystery
The Glass Cipher
A symbol has appeared across the city. Every witness saw a different piece.
Decode the missing notebook of an inventor whose final machine could reveal what a city chooses to forget. Solve alone, compare theories with other investigators, and decide which society you trust.
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The evidence board
What do you notice?
Inspect the public fragments, form a theory, then send a field investigator to test it in the real world.
Spoiler-safe preview: answers, precise locations, and unreleased clue contents stay hidden here.
Case timeline
The story changes when you solve it.
Each chapter opens only after the community proves the previous theory. Watch the board; new fragments can change everything.
- 1
The Invitation
Now investigatingA mirrored envelope arrives without a sender.
The Missing Apprentice
Three witnesses disagree about the night the notebook vanished.
The Observatory
The final fragment points above the city—and back at the investigator.
Choose a lens
No faction sees the whole truth.
Your faction changes which public fragments you receive—not whether you can finish the case.
The Cartographers
0 membersMap patterns, routes, and the geometry beneath ordinary streets.
The Lantern Society
0 membersIlluminate hidden histories and preserve the testimony of witnesses.
The Keepers
0 membersProtect dangerous knowledge until the world is ready for it.
Three ways in
You do not have to be there to matter.
Role 1
Hunt
Visit safe public TAGGs, use AR when available, and prove the community’s leading theory.
Role 2
Decode
Study the fallback clues from anywhere, compare patterns, and propose the next move.
Role 3
Share
Post spoiler-safe evidence, invite a second opinion, and bring a new detective into the case.
This prologue is playable anywhere. Future field chapters will only use public, accessible locations. Stay aware of traffic and never enter private or restricted spaces.