walkback.live

You're told how it ends.
Then you walk back.

A free life simulator. One life is drawn from real demographic statistics — where you are born, how long you live, what ends it. You get the ending first, then step backwards through that life, one year at a time, until you reach the day you were born.

Play it free →

What makes it different

Most life simulators run from birth to death. This one runs in the opposite direction, using the same family of public data. Reversing the order changes what a year means. A plain line — "moved to another city at 31" — reads as a small event when you don't know the ending. Once you know that life ends at 47, the same line becomes a countdown.

Forward, a year looks like chance. Backward, the same year looks like a setup. That reversal is the whole idea.

The data

Countries and territories173, weighted by annual births rather than population
SourcesUN World Population Prospects 2024 revision (estimates through 2023), World Bank WDI, WHO GHO
Languages13, each with its own URL
CostFree in full. No account, no download, no third-party analytics.
DisclaimerA model, not a prediction and not health advice. Stated on every page.

Some runs end very early, because that is what a life table says. The child mortality gap between countries — 115.6 versus 2.4 deaths before age five per 1,000 births — is visible in the model rather than smoothed away.

More to read

Languages

English · 日本語 · 简体中文 · 繁體中文 · 한국어 · Español · Français · Deutsch · Português · Русский · Tiếng Việt · ไทย · Türkçe