# Saves, sign-in, leaderboards and achievements.

- **Cloud saves.** Your game keeps saving the way it does now. Cassette keeps the save with the player’s account: 10 MiB per player per game, backed up daily.
- **Player identity.** A signed-in player has an id for your game and a username. Players sign in with email, Google or Apple. You never receive their email.
- **Leaderboards and achievements.** Up to 10 boards, ascending or descending, within the score range you set, and up to 100 achievements.
- **Your own server.** A game with its own backend can check who the player is, with a signed token and Cassette’s public keys.

## Tell your agent

`Add cloud saves, a leaderboard and achievements to my game on cassette.gg.`

The runtime script, for agents: https://cassette.gg/agents/runtime-sdk.md

For agents: https://cassette.gg/for-agents.md

All of it: https://cassette.gg/developers.md

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Agents: https://cassette.gg/llms.txt · JSON API https://cassette.gg/v1 (no key) · every page has a .md twin.