Mirror Earth by @mattshumer_
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Sandbox, Open world · Claude Fable 5.2

Mirror Earth

Top 5 so far in Edition No. 3

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Opens spawn.co in a new tab

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You start on a crowded street, can jump to any place by name, and switch between walking, a car and a helicopter. The world uses real map data, and the creator says the weather follows the real Earth's as you play. Almost everything can be broken, and the post invites you to destroy anything. There are no goals: it's a sandbox to roam and wreck. It runs on Spawn, in a solo room.

How the creator made it

The creator first had Claude Fable 5.2 build a browser voxel engine from scratch as a test of how well it could simulate destruction. They say the model alternated between improving the look of the engine and optimizing it to keep it running on their MacBook. The creator then asked Fable to use that engine to build an Earth-scale world. In a follow-up, they pointed out that the car could still drive through objects.

From their post on X ↗, a page on somethingbig.ai ↗, a video on YouTube ↗ and another post on X ↗.

The game belongs to @mattshumer_. Preview recorded by us. Made this game? Here's how we list it.