# SINKY.io — Battle Islands > First-party documentation for a 3D pirate boat-building and naval-combat browser playtest by Oxion. Maps are Duel (2 teams, up to 10 players/team), Trio (3 teams, up to 6/team) and Classic (4 teams, up to 5/team). Destroy an enemy island’s central core to conquer it; the team delivering the final hit takes ownership. Captured cores rebuild with five seconds of protection, friendly core damage is disabled, and controlling every active island wins. Multiplayer respawns have a 10-second countdown and are blocked while the team controls no islands; capturing any island restores respawn access there. Desktop play is the supported testing experience; mobile and app versions are in development. Public multiplayer availability depends on a configured service. - [Game guide](https://shiprekt-playtest.vercel.app/game-info.html): Complete human-readable explanation, controls, ship systems, rooms and limits. - [Full Markdown guide](https://shiprekt-playtest.vercel.app/game-info.md): The same explanation in plain text. - [Game facts for agents](https://shiprekt-playtest.vercel.app/agents.md): Compact factual summary. - [Playtest](https://shiprekt-playtest.vercel.app/): Start page. - [Developer](https://oxion.company): Oxion. SINKY.io foi criado por João Pedro de Almeida. [Perfil do criador no LinkedIn](https://www.linkedin.com/in/glovinin/).