1. Operator and acceptance
Brainbunk is independently operated in Finland by Peter Lindroos. Questions can be sent to support@brainbunk.com.
By using Brainbunk, you agree to these Terms of Use. If you do not agree, do not use the service or create an account.
Effective date and version: 3 August 2026, version 2026-08-03.
2. The service
Brainbunk provides free browser-based games, including Sudoku, Grid Sweep, Merge Grid, and Block Fit. Games can be played without an account. An optional Brainbunk account can synchronize supported game saves and statistics across devices or browsers.
Brainbunk is provided for personal entertainment. Game statistics come from browser-controlled clients and are not verified competitive records.
3. Accounts
You must be at least 13 and legally able to agree to these terms to create an account. If the law where you live requires parental or guardian authorization at a higher age, that authorization is required.
You are responsible for providing a working email address, keeping your email-password, Google, or Microsoft credentials secure, and contacting Brainbunk if you suspect unauthorized access. Do not attempt to access another person’s account or data.
Accounts with no sign-in or recorded account activity for more than 12 months may be deleted during an account review, which is performed at least once a year.
You can delete your Brainbunk account from Account Information. This deletes the Brainbunk account and its linked cloud game data; it does not delete or change your Google Account, Microsoft account, or data held by those services.
4. Acceptable use
Do not use Brainbunk unlawfully or misuse it to interfere with the site, bypass security or access controls, probe another user’s data, distribute malicious code, automate disruptive requests, or misrepresent game results as independently verified.
Brainbunk may restrict or suspend access when reasonably necessary to protect the service, its users, or others, or to respond to unlawful or abusive use.
5. Game data and availability
Local saves and statistics depend on browser storage and may be lost if site data is cleared, storage is blocked, or you change devices. Account synchronization is a convenience feature and is not a guaranteed permanent backup. Keep any information that matters to you separately.
Brainbunk may fix, change, temporarily interrupt, or discontinue a game or feature. Reasonable efforts will be made to avoid unnecessary data loss and to communicate a significant planned discontinuation when practical, but uninterrupted availability cannot be guaranteed.
6. Intellectual property and feedback
Brainbunk’s site design, software, text, graphics, and branding are owned by the operator or used with permission. You may use the service for personal, non-commercial play, but you may not copy, redistribute, sell, or present Brainbunk content as your own except where applicable open-source licences or law allow it.
If you believe content on Brainbunk infringes your rights, or you want to send feedback, contact support@brainbunk.com with enough information to understand the issue.
7. Third-party services
Brainbunk uses Supabase for optional accounts and account-linked data, Google for optional sign-in and consent-based Analytics, Microsoft Entra ID for optional Microsoft sign-in, Hetzner for VPS hosting in Finland, and OVH for domain, DNS, and email services in France. These services have their own terms and technical limitations. Social sign-in and Google Analytics are separate features.
8. Responsibility and statutory rights
Brainbunk is a free service provided with reasonable care and on an as-available basis. To the extent permitted by law, the operator is not responsible for indirect loss, lost browser data, or interruptions caused by networks, browsers, third-party providers, maintenance, or events outside reasonable control.
Nothing in these terms excludes responsibility that cannot legally be excluded or limits any mandatory consumer or data-protection rights that apply to you.
9. Privacy
See the Privacy Notice and Cookie and Storage Notice for information about accounts, browser storage, analytics, service providers, retention, rights, and account deletion.
10. Changes, questions, and disputes
These terms may be updated when the service or legal requirements change. Material changes will be communicated through the site when practical, and the effective date above will be updated.
If you have a question or dispute, please first email support@brainbunk.com so it can be discussed and, where possible, resolved informally.
These terms are governed by Finnish law, without removing mandatory rights or legal remedies available to you under the law of your country of residence.