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Patch 1.0.15 — terrain duplication fix and better Deep North armour drop rates

Removes a terrain-duplication bug that cost performance, raises the drop chance for Deep North armour moulds, increases Writhan spawns, and untangles dev-command item marking.

Valheim 1.0.15 Patch Released 18 Sept 2026 4 changes

Transcribed from the official release notes: valheim.com ↗

Terrain & worldItems & lootCreaturesDev commands

What changed

Terrain & world

  • Fixed an issue that could cause terrain duplications which resulted in a loss of performance

Items & loot

  • Increased drop chance for Deep North Armor moulds by making both Jotun Warrior types drop both medium and heavy armor moulds

Creatures

  • Writhan spawn rate and areas increased

Dev commands

  • Items affected by dev commands will no longer be marked for characters which have enabled the dev bypass command, and naming has been updated and items can now stack together again

Guides this version affects

Will your old world still work?

Worlds created before 1.0 keep working and keep receiving new content, but 1.0 changed how terrain is generated. See save compatibility by version before you update a world you care about.

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