Privacy Policy

Circuit Keep is operated by Lambda 7 Tech LLC (“we”, “us”). This policy explains what data the game may process, why, and your choices. Circuit Keep is a single-player tactical tower defense game. We have built it to need as little of your data as possible.

1. Data we do not collect

• No account or sign-up. The game does not ask for your name, email, phone number, or password.
• No analytics SDK is bundled in the game (no Google Analytics, PostHog, Mixpanel, Amplitude, Segment, or similar).
• No crash-reporting SDK is bundled in the game (no Sentry, Bugsnag, Crashlytics, or similar).
• No advertising SDKs and no ad personalisation.
• No location data.
• No device fingerprinting and no persistent identifiers we generate ourselves.

2. Data stored on your device

Circuit Keep stores your gameplay state locally so your progress survives between sessions. This data lives only on the device or browser where you play and is never transmitted to us. It includes:

• Audio settings (master, SFX, BGM volume, mute flag).
• Gameplay preferences (instant placement, FPS meter, graphics tier, render scale, max FPS, pause-on-unfocus).
• Tutorial flags (which tutorial cards you have already seen).
• Campaign progress (level completion, research points, cleared levels, total playtime).
• Endless-mode statistics (run count, wave totals, timing).
• Tech-tree pan / zoom view state.

You can wipe local data at any time by clearing your browser’s site storage (web build) or by deleting the game’s local data through your operating system (desktop build).

3. Steam (desktop build)

The desktop version of Circuit Keep is distributed through Steam and runs alongside the Steam client. When you launch Circuit Keep through Steam, Valve’s Steam client itself collects standard telemetry (such as your Steam ID, playtime, and hardware information) under Valve’s Privacy Policy. We do not control that collection; it is governed by your agreement with Valve.

The game integrates the Steamworks SDK so that achievements, stats, and Steam Cloud saves can be supported. When those features are active, the following data is exchanged with Steam on your behalf:

• Achievements and stats: when you reach an in-game milestone, the unlock is reported to Steam and tied to your Steam ID. Steam aggregates achievements and (where supported) global stats.
• Steam Cloud saves: if Steam Cloud is enabled on your account, your local save files (the data described in §2) are synced to your Steam Cloud storage so they follow your account across devices. We do not access these files outside of Steam’s sync mechanism.
• Player identity: the game can read your Steam display name and Steam ID locally to greet you and to attribute achievements. These values stay on your device unless used by a Steam-side feature above.

If you disable Steam Cloud for Circuit Keep in your Steam library settings, save data will not be uploaded.

4. Web build

The browser version of Circuit Keep at app.circuitkeep.com stores its data in your browser’s local storage and IndexedDB. It does not send gameplay data to any of our servers and does not load analytics or tracking scripts. Hosting providers (such as Cloudflare) may receive standard request metadata (IP address, user agent) when you load the page, as is standard for any website on the internet.

5. Marketing site (this site)

circuitkeep.com is a static marketing site hosted on Cloudflare Pages. It does not run analytics scripts or set tracking cookies. Cloudflare may log basic request metadata (IP address, user agent, page path) to operate and protect the site under Cloudflare’s Privacy Policy.

6. Service providers

We rely on a small number of third parties to distribute and host the game. Their privacy policies apply to their handling of your data:

• Valve / Steam — desktop distribution, achievements, Steam Cloud.
• Cloudflare — hosting and CDN for the web build and marketing site.

7. Children

Circuit Keep is suitable for general audiences and is not directed at children under 13. We do not knowingly collect personal data from children. If you believe a child has provided personal data to us, contact us and we will delete it.

8. Your rights

Because the game itself does not transmit personal data to us, most data-protection requests come down to data on your own device. You can:

• Wipe local game data by clearing your browser site data (web) or deleting the game’s save folder (desktop).
• Manage Steam-side data (achievements, Cloud saves, hardware survey) directly through Steam.
• Email us at privacy@circuitkeep.com with any privacy questions or requests under applicable law (GDPR, UK GDPR, CCPA / CPRA, etc.).

9. Changes

If we add features that change what data is processed (for example, online leaderboards, cloud saves outside of Steam, telemetry, or crash reporting), we will update this policy and revise the “Last updated” date at the top of this page.

10. Contact

Lambda 7 Tech LLC — privacy@circuitkeep.com.