Privacy & cookies

Last updated 29 October 2026

CellGame.io is a browser game run by SENTRY (sentry-corp.com). This page explains what data the game uses and why.

What we store

A session cookie (cg_sid, HttpOnly, up to 2 years). It is a random number that keeps your profile: nickname, skin, points and whether you removed ads. We store only a keyed hash of it, never the cookie itself. No account, email or password is needed.
Game results: your scores, points and skins, linked to that profile.
Settings in your browser (local storage): sound, graphics and difficulty.
Abuse limits: your IP address is used briefly to rate-limit requests and is not kept with your profile.

Advertising

The free version shows ads served by Google (AdSense and H5 Games Ads). Google and its partners use cookies or similar technology to show ads and measure them, and may personalise ads based on your visits to this and other sites. In the EEA, the UK and Switzerland you are asked for consent first, and you can change your choice at any time from the privacy message link. You can turn off personalised ads in Google's Ad Settings, and read how Google uses data from partner sites.

Players who pay $5 to remove ads never load Google's ad code.

Payments

Payments are processed by Stripe. We never see your card details; Stripe tells us only that a payment for your profile succeeded, its amount and currency. A paid purchase also comes with a one-time code that removes ads on one other browser or device. See Stripe's privacy policy.

Analytics

We use Cloudflare Web Analytics, which counts page views without cookies and without tracking you across sites.

Keeping and deleting data

Profiles nobody used are deleted after 7 days. Clearing your cookies starts a fresh profile; the old one is then unreachable and its data is removed with the unused ones unless it holds a purchase, which we keep for accounting. To ask for your data or its deletion, email support@cellgame.io and include your one-time code or Stripe receipt if you have one.

Children

CellGame.io is meant for a general audience and is not directed at children under 13.