Simon Willison adds four‑player mode and Compass Rose map to Battledrones
The new map, called “Compass Rose,” features four‑way rotational symmetry and supports up to four AI players, while the WebSocket‑based multiplayer network now accepts up to four human participants via share links or QR codes.
Key points
- Claude Opus 4.5 generated the new "Compass Rose" map and updated WebSocket code
- Four‑player mode supports up to four human players or AI via share links or QR codes
- New team colors are purple and green, added to existing blue and red designs
The update was generated with Claude Opus 4.5, which created the map and modified the networking code. New team skins appear in purple and green, joining the existing blue and red designs that can be previewed in the updated model browser.
This change expands Battledrones from a two‑player experience to a small‑team multiplayer game, illustrating how AI‑assisted development can accelerate feature rollout for indie projects.
Model page: Claude Haiku 5.5 →
battledrones v14: Compass Rose, a four player map
Simon Willison · 24 October 2026
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