Last updated: June 10, 2026
Privacy Policy
13 and 0 is a free League-inspired roster builder where you draft Worlds players and simulate a run. This policy explains what data the site uses, how accounts work, and what third-party services may be involved.
Data We Collect
You can play without creating an account. When you play as a guest, the game stores draft and display preferences in your browser only, including theme, current run data, and saved simulation state.
If you create an account, we store the account information needed to run profiles and leaderboards:
- Username, email address, and encrypted authentication credentials handled by Supabase.
- Optional Google login identity if you choose to sign in with Google.
- Game stats such as total runs, Worlds wins, 13-0s, hard Worlds wins, and hard 13-0s.
Run Simulation and Leaderboards
When you simulate a run, the selected roster and game mode are sent to a Supabase Edge Function so results can be generated server-side. If you are signed in, the resulting account stats are updated for leaderboard features. We do not store chat messages, private notes, or payment details in the game database.
Cookies and Local Storage
13 and 0 uses browser storage to keep preferences such as light/dark mode, auth display state, and in-progress drafts. Supabase and Google login may use cookies or similar storage to keep you signed in.
We do not currently run advertising cookies. If advertising is added later, this policy will be updated before or when that change goes live.
Third-Party Services
The site uses Supabase for accounts, database storage, and Edge Functions. Google may be used for optional sign-in. Ko-fi is linked for support, and X/Discord links may take you to external community pages. These services have their own privacy policies.
Children
13 and 0 is not directed at children under 13, and we do not knowingly collect personal information from children under 13.
Changes
This policy may be updated as the project changes. When relevant changes are made, the update date at the top of this page will be revised.
Contact
Questions about this policy can be sent to contact@13and0.com.