Eight biomes, caves with ore by depth, rivers from spring to sea, and ruins, shrines and Delvings to find.
Wave 13 is a new world generator, version 6, for new seeds. A 2 km region map holds eight biomes that blend over 300 m around the home valley, and each 1.5 km region has a Keeper shrine. Caves have entrances, chambers, flooded bottoms, an underground river, glow moss and dripstone, with five ores found by depth and gloamlings in the dark. Rivers are traced from their springs to the sea, the great river or a lake.
Ruins, shrines, Delvings in three sizes, strongholds, huts, standing stones, inns and old roads are placed across the land, none in the home valley's core. The world panel has a map, and there is a compass and biome names. Worlds made before this keep every byte: versions 1 to 5 are unchanged.
Structures are small and plain, caves are dark, the moor reads green and the pines oak-coloured until their own materials land, rivers sit in standing steps, and the test route was mostly teleport hops.
Live on our demo host since live rebuild 26 on 17 October 2026. The demo host is our own test server; since that rebuild a shared world on it can be joined from a link over the internet.
Every wave closes with a play test on the build machine in the browser: a scripted story test that plays the new loop end to end and reloads the world to check it came back exactly, the older waves' story tests run again on the merged build, the engine's unit tests, and a 15-minute soak that records frame rate, faults and world memory. The numbers above come from those runs, as written in our build tracker.