Cookie Notice

01 What a cookie even is

A cookie is a small file a site asks your browser to hold onto and hand back on your next visit. Local storage is a related tool that does much the same job but never travels back to the server on its own. Most of what Greatest Games remembers uses the second kind — it lives with you, not with us.

02 What we keep on your device

None of the following is a cookie in the traditional sense, and none of it leaves your browser unless you ask it to. We list it here because it’s the honest answer to “what does this site remember about me?”

Game progress

Your streak, completed games, and per-game stats — kept in local storage so your progress stays yours. No account required to hold it.

Today's progress

A small daily record so a half-finished puzzle is still there when you come back later the same day.

Settings

Preferences such as reduced motion, contrast, and a game's difficulty toggle. These sit in local storage and never leave your device.

Your cookie choice

One more local-storage entry remembers whether you said yes or no to analytics, so we don't ask again on every visit.

03 The cookies we set

Signing in sets a first-party session cookie — the strictly-necessary kind — so the site knows it’s still you on your next visit; until you create an account and sign in, no session cookie is set. Separately, with your consent where consent rules apply, two analytics providers set cookies: PostHog sets first-party analytics cookies to recognise a returning visitor and stitch a single session together, and Google Analytics sets its first-party _ga cookies for the same job on Google’s side. There are no advertising cookies today — section 05 covers what changes when ads launch.

04 Analytics

To understand whether a puzzle landed, we record usage events — to our own first-party log, to PostHog, and to Google Analytics 4 (loaded through Google Tag Manager). PostHog includes session replay of how a page was used, with all text inputs masked so nothing you type is recorded. Events carry an anonymous device and session identifier, not your name — tied to your account only if you’re signed in. We never store raw IP addresses, your email, or anything you typed in this data.

We also have Google signals enabled in Google Analytics. For visitors signed in to a Google account who have consented within Google, this lets Google associate their visit with its own information so we can see aggregated, de-identified demographic reports — broad age, gender, and interest groups across our audience, never tied to any individual, and withheld entirely for groups too small to stay anonymous. This same data may be used for ads personalization in connection with the advertising in section 05. Turning analytics off below stops it, and signed-in Google users can also manage the association at Google Ads Settings. The full picture is in our Privacy Policy.

05 Advertising cookies

We don’t serve ads today, so no advertising cookies are set. To keep the games free, we’re preparing to introduce a modest amount of advertising through Google AdSense. When that begins, Google and its certified partners (third-party vendors including DoubleClick) will set advertising cookies, which may be used to show ads based on your prior visits to this and other sites. Where consent rules apply, they’ll ask first. You can opt out of personalised advertising at Google Ads Settings and aboutads.info/choices. We’ll update this page the day anything changes.

06 Your choice, managing & clearing

The switch below is live — it’s the same choice the consent bar records, and it works wherever you’re visiting from. Turning analytics off stops PostHog, Google Analytics, and our own event log in one go; the games play exactly the same either way.

Beyond that, you’re in control of all of it. Clearing your browser’s site data wipes our local storage and any session cookie in one go — the games still play, you’ll simply start a fresh streak. Most browsers also let you block cookies entirely; the main thing that breaks is staying signed in.

The best cookie notice is the one that ends with a working off switch.— Our standing aim

For the fuller picture of what we collect and why, see our Privacy Policy. If something here is unclear, we’d rather you asked.