As with any major Unity upgrade, mods broke. The update to Unity 2022 was heavy, and mods relying on Asset Bundle loading needed updates. Platforms like and Nexus Mods quickly updated frameworks like BepInEx to support version 0.218.15 . Major overhauls like "Valheim Plus" and "Plant Everything" released specific "2025/Ashlands" editions to ensure compatibility.
Beyond the survival content, the patch updates critical underlying architecture on the Valheim Steam Public Test and live servers. The game engine received an upgrade to help stabilize frame rates when rendering large-scale base builds or dynamic particle effects like falling ash. Valheim v0.218.15a