erstwhile gameA little hindsight.
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Terms of use

Updated November 9, 2026

These terms apply to Erstwhile Game at erstwhilegame.online. By using this site, you agree to these terms. Questions can be sent to support@erstwhile.online.

A historical game

The game is free entertainment. No real money is invested, held or paid out. Results are not financial, investment, tax or trading advice. Historical returns cannot predict future results. Do not use a puzzle result as a reason to buy or sell an asset.

Independent status

Erstwhile Game is independently operated. It is not affiliated with or endorsed by other games of a similar name, any company named as an asset, or any data provider. Company names and identifiers describe the assets used in the puzzle. They do not indicate sponsorship.

Data and availability

Historical prices may contain errors, reflect provider adjustments or differ from another price series. Some options use funds as proxies for underlying assets. Our data explanation describes those choices. We may correct data, add puzzles, change features or suspend the site. We do not guarantee continuous access or the permanent availability of a particular puzzle.

Your saved game

Progress is stored in your browser as described in the privacy policy. We cannot recover it after browser data is cleared. There is no cross-device synchronization or verified public leaderboard.

Acceptable use

You may play the game and share your results. Do not interfere with other visitors, overload the service, bypass access controls or impersonate this site or another game’s operator. Do not frame the site in a way that misrepresents its ownership.

Creative work and third-party rights

The interface code, original illustrations, clue wording and puzzle arrangement created for this site are distinct from the underlying game ideas and historical facts. Third-party names, marks and data remain subject to their owners’ rights and applicable terms. These terms do not claim exclusive ownership of game mechanics or public facts.

Reports and corrections

If you find a data error or believe material on this site infringes your rights, email support with the page or puzzle identifier, the material in question, your basis for the report and a way to reach you. We will review sufficiently detailed reports and take appropriate action. Sending a report does not require sharing private account or financial credentials.

Responsibility

The game is provided as available, without a promise of error-free operation. To the extent permitted by applicable law, the operator is not responsible for losses caused by relying on game outputs, service interruptions or lost browser progress. Nothing in these terms excludes liability that cannot lawfully be excluded or removes mandatory consumer rights.

Updates

We may revise these terms as the game changes. The latest revision date appears above. Continuing to use the site after an update means accepting the revised terms.

A quick field guide

Five years. Three decisions.

You have $10,000 in a hidden year between 2005 and 2020. Can you grow it faster than the S&P 500?

  1. 1

    Build your portfolio

    Place 10 chips across four stocks, two other assets and cash. Each chip starts at $1,000. Put up to 4 on any option, including cash.

  2. 2

    Hold or change course

    At years 2 and 4, see your positions and a new historical clue. Hold keeps your actual holdings. Rebalance sells everything: divide the current total into 10 equal chips and place them again.

  3. 3

    See where you landed

    Year 5 reveals the dates, your return and the S&P 500 fund result. See the strongest possible strategy and how your result compares with all legal strategies.

Daily changes at midnight in your device’s local time. Unlimited includes 100 practice puzzles plus previously released Daily puzzles. Gold, silver, oil, bonds and commodities use the fund proxies named in asset details. No fees, taxes or trading costs are simulated.