Sentient Square Games

Privacy

Specimen IX: Evolving Sudoku · Last updated 28 October 2026

Who we are

Specimen IX is made by Sentient Square Games. The rules for playing are in our terms of service. If you have a question about your data, or want it deleted, email info@specimen-ix.com.

What we collect

• Your pilot. When you first play, the game creates a guest pilot with a random callsign (you can change it). It's linked to your browser by a random sign-in code stored on your device.
• Your progress. Career score, best score, number of runs, daily streak and daily voyage results, so your progress is kept and the leaderboards work.
• Your runs. For each run: the mode, score, grids, cells, how long it lasted, and a log of when you placed each number. This is only used to check runs are genuine (anti-cheat).
• If you save your progress with Google: your Google account ID and email address. We don't receive your name, contacts or anything else from Google.
• If you save your progress with an email link: your email address.
• Feedback you send: your message, an email address if you choose to add one, and some technical details to help fix bugs: game mode, difficulty, settings, current score and grid, your browser type and screen size.
• Internet address: used briefly, in scrambled form, to stop abuse (for example, someone creating thousands of guest pilots). It isn't stored with your pilot.

What's stored on your device

The game uses your browser's local storage for your settings (sound, accessibility, power-up loadout), a copy of your progress, and the sign-in code for your pilot. It doesn't use advertising or tracking cookies.

Who else is involved

• Cloudflare hosts the game and its database.
• Google, only if you choose "Continue with Google" to sign in.
• Resend, only if you ask for an email sign-in link (it delivers the email).
• Google Fonts serves the game's fonts.
• Ko-fi, only if you choose to visit our Ko-fi page; it has its own privacy policy.

Leaderboards

If you save your progress, your callsign and scores can appear on the public leaderboards. Guests never appear there. Choose a callsign that doesn't identify you if you'd rather stay anonymous.

How long we keep it

We keep your pilot and progress for as long as the game is running, so you can come back to it. Feedback is kept until it has been dealt with. If you clear your browser data as a guest, the link to your pilot is lost. Ask us and we'll delete it from the server too.

Your choices

• You can play without saving your progress to an account.
• You can ask us to see, correct or delete your data at any time by emailing info@specimen-ix.com. Tell us your callsign, and the email you saved with if any.

Children

Specimen IX isn't directed at children under 13, and we don't knowingly collect personal information from them. If you think a child has saved progress with their email address, contact us and we'll delete it.

Changes

If this policy changes, we'll update this page and the date at the top.