America 1776 – 2026  ·  The 250th Anniversary

You cannot change
what happened.
You can only discover
what it cost.

History’s outcomes are fixed. The human cost of reaching them is not. Step inside 25 defining American moments across 250 years.

Choose a historical moment. Step inside it as the person whose decisions shaped what happened next.

Browse all scenarios

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25
Scenarios at launch
75
Perspectives
250
Years of American history
1,514
Lives in the historical record

The premise

Other experiences ask:
can you change the past?
We ask something harder.

Apollo 13 returns safely. John Lewis reaches the other side of the bridge. The Woolworth counter holds. You know this before you begin.

What you don’t know is the margin. How close to blackout did Armstrong get before he fired the thrusters? How many times did Lewis nearly break his discipline before the troopers charged?

The ledger doesn’t track whether you win. It tracks what winning actually cost the people who did it. That’s the history they don’t put in the textbook.

The macro-ledger is fixed
The crew of Apollo 13 survives. You cannot change this. The historical record is the record.
The micro-ledger is yours
Your decisions determine the human cost of that survival — the physical toll, the psychological margin, the weight carried home.
The shared fact ledger is real
Every number on screen comes from the historical record. NASA telemetry. Mission transcripts. Primary sources. Nothing is invented.
The epilogue is the point
Every scenario closes with what the people in that room lived with afterward. Sourced. Documented. The part that usually gets left out.

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The Full Ledger

All scenarios

The mechanics

How it works

01
Choose your position
Every scenario offers three perspectives on the same moment. The event is fixed. The seat you occupy changes everything you see.
02
Make real decisions
A guardrailed AI keeps every choice inside the historical record. You cannot invent new options — only choose between the ones that actually existed.
03
The ledger tracks cost
Not victory. Not survival. The ledger measures what your decisions cost — physically, psychologically, and tactically — against the historical record.
04
Read the epilogue
Every scenario closes with what the people in that room carried for the rest of their lives. Primary sources included.
For educators & institutions
Free educator access Curriculum guides Primary source bibliography Classroom-safe guardrails Grades 8 – university