patch · May 6, 2026
Valheim Public Test Patch 0.221.13 Introduces New Chunk-Based Save System
Valheim's Public Test branch receives update 0.221.13, overhauling world saves into a chunk-based directory structure designed for faster saves and reduced file corruption risks.
Valheim developers have pushed patch 0.221.13 to the Public Test branch, replacing the traditional world save architecture with a new chunk-based system.
New World Save Architecture
Worlds no longer rely on single .db and .fwl files. Instead, worlds are stored in dedicated folders with the .db file split into smaller chunk pieces. Character saves remain unchanged.
Selective Chunk Saving
During world saves, the game now updates only the specific chunks modified since the last save. This approach decreases save times and minimizes corruption risks.
Backups and Safety Checks
Backups now receive their own separate folders. When loading an unchunked legacy world, the game automatically creates a backup first. Post-save verification checks run to ensure data integrity.
Cloud Limits and Mod Warning
The increase in individual save files may interact with platform cloud storage limits that restrict file counts. Modded players are advised that this new save system is untested with mods and requires caution.
Why this patch matters
Patch 0.221.13 modernizes Valheim's backend file management to protect against corruption and speed up saves, though modded users should proceed with caution.