Valheim Patch Notes: Hotfixes 1.0.10 to 1.0.20

Every post-launch Valheim 1.0 hotfix in one tracker: trophy drop star scaling in 1.0.20, Deep North fixes, cheated item reset, and server performance.

The 1.0 launch on 9 September 2026 was quickly followed by a steady stream of fixes. Iron Gate has shipped continuous post-launch updates: 1.0.10 and 1.0.12 on 11 September, 1.0.14 on 17 September, 1.0.15 on 18 September, 1.0.16 on 25 September, 1.0.17 on 2 October, and 1.0.20 on 15 October 2026. This page tracks each update against its official Steam announcement.

Version Timeline

Patch 1.0.10 - All Platforms

From the official hotfix announcement:

• Deep North heavy armour can now be repaired.
• Greydwarf Shamans in Deep North now deal appropriate amounts of damage and healing.
• Punching no longer removes snow; landing on snow (rather than walking through it) now removes it.
• Sound effects updated for several creatures and the Deep North snow.

The armour repair fix matters most to endgame players: the new polar armour set could not be serviced at launch, which left a gap in the 1.0 progression loop.

Patch 1.0.12 - Steam First, Crossplay Compatible

The 1.0.12 fixes are fully crossplay compatible and reach all platforms across rolling hotfixes:

• Forge of Potential no longer unlocks recipes that should not be unlocked.
• Item stand durability preserved: items on armour and item stands no longer lose durability and upgrade level, if the world has not yet been loaded in the 1.0 update.
• Fixed a crash that could trigger when players accessed a zone that was not loaded.
• Banlist and whitelist now accept old IDs (for example Steam_123456789) alongside the new format (V_123456789).
• Achievement opt-in command: a popup clarifies when achievements can be received again, and a new devcommand re-enables achievements after devcommands or mods were used.
• The Cart fits through the Timberwood Drawbridge more easily.
• Jotun Puffs and Magecaps received a visual fix.

Patch 1.0.14 - Quality-of-Life & Platform Optimization

This patch addressed key control refinements and graphics stability:

• Keybinding and accessibility options: alternate dodge keybinds, customizable hotbar keys, and radial-wheel remapping.
• Combat snap: optional attack-rotation snapping to lock facing direction during weapon combos.
• GPU tessellation adjustments: heightmap shadows and tessellation profiles tuned for mid-tier hardware and Switch 2 handheld modes.
• Jotun Puffs and Magecaps no longer respawn.
• Deep North battleaxes now have the correct tool tier and can cut all the trees.
• The Ballista accepts all new trophies (every Deep North enemy plus Bjorn and Vile).
• Timberwood build pieces no longer appear in earlier biome locations.
• Deep North and Winding Tunnels music was rebalanced to remove loop clicks.

Patch 1.0.15 - Terrain Duplication & Drop Rates

• Terrain duplication fix: a bug that duplicated terrain and hurt performance is resolved. Deforming terrain along seams clears them permanently.
• Deep North armour moulds drop more often: both Jotun Warrior types now drop both the medium and heavy armour moulds.
• Writhan spawn rate and areas increased.
• Dev-command item marking cleaned up: items affected by dev commands stack together again for bypass-enabled characters.

Patch 1.0.16 - Terrain Seam Persistence & Raid Rebalance

Patch 1.0.16 (25 September 2026) addressed critical world persistence and achievement progression:

• Deep North terrain persistence: resolved the recurring regression where terrain modifications reverted when unloading Deep North zones. Players can smooth seams using pickaxes, hoes, or walking across snow.
• Raid spawn normalization: eliminated runaway spawn multipliers that caused overwhelming mob counts during base raids.
• Achievement validation fixes:
  • Fixed progression tracking for the Child of Odin achievement.
  • Fixed room comfort evaluation for the Comfort is King achievement.
  • Removed the unobtainable Blue Mushroom from The Gourmet completion checklist.
• Building protection: placeable decorative boulders and landscaping rocks no longer take weathering rain damage.
• Boss arena boundary enforcement: fixed Deep North boss encounter spawns wandering outside designated combat boundaries.
• Graphics profile tuning: tessellation is automatically disabled when using the Low visual preset to preserve framerates.

Patch 1.0.17 - World Chunk Split Bug & Style Fallback

Patch 1.0.17 (2 October 2026) deployed critical save file protection:

• World chunk preservation: resolved a high-severity bug that could erase built structures or dropped items when large .db world chunk files were split into smaller sector saves during background world compression.
• Style fallback safety: fixed an invalid style index on Root shields (affecting crossplay clients) by resetting unknown cosmetic indices to the base appearance rather than triggering world desyncs.
• Credits and text polish: restored missing development credits and updated localized terminology.

Patch 1.0.20 - Trophy Drops & Item State Restoration

Patch 1.0.20 was deployed on 15 October 2026 across all live platforms, targeting drop progression, anti-cheat flag resets, exploit fixes, and server stability:

• Trophy Drop Star Level Scaling: Trophy drop chance now scales directly with monster star level. High-tier enemies (1-star and 2-star variants) feature significantly elevated trophy drop rates, reducing grind when crafting decorative bear rugs or gathering summoning trophies.
• Pseudo-Random Drop State Preservation: The game internal pseudo-random drop counter now saves across game sessions rather than resetting to zero upon logout or world reboot. This eliminates frustrating bad-luck loops for players farming rare trophies or materials across multiple play sessions.
• Forge of Potential Exploit Resolved: Patched an item duplication and tier upgrade exploit at the Forge of Potential that previously allowed crafting advanced gear without spending intended catalyst resources.
• Cheated Item Flag Reset: Reset the false “cheated” flag on all legitimate items and build pieces affected by the 1.0 launch bug. Genuine survival inventory and player constructions mistakenly marked as cheated are now fully restored to clean vanilla status.
• Cheat Sword and Cheat Sledge Flag Recognition: Improved item flag recognition for the Cheat Sword and Cheat Sledge developer weapons, ensuring proper administrative tagging without polluting standard game registries.
• Dedicated Server CPU Optimization: Fixed an issue where client hosts running vertical sync (v-sync) caused dedicated servers to run at uncapped frame rates, leading to excessive CPU utilization and thermal spikes.
• Sheathed Weapon Attachment Points: Made visual adjustments to sheathed weapon attachment sockets on player characters to eliminate weapon model clipping and improper orientation when holstered.
• Xbox One and Xbox Series X|S Settings Retention: Fixed a bug on Xbox One and Xbox Series X|S consoles where customized control, audio, and visual options failed to save persistently across game restarts.
• Mac App Store Crossplay Notice: Crossplay functionality for the Mac App Store release is temporarily delayed due to platform certification timelines. Mac App Store players will connect with Mac App Store worlds until certification completes, while Steam Mac users continue to enjoy full crossplay.

World Maintenance Checklist

• Review your mods against our Valheim 1.0 Best Mods Guide to ensure plugin compatibility with Hotfix 1.0.20.
• If achievements were locked by earlier devcommands use, the 1.0.12 opt-in command restores them; 1.0.16 stops raid-spawned items from being wrongly flagged, and 1.0.20 scrubs false cheated tags from valid builds.
• For dedicated server administration and port configuration, refer to our Dedicated Server Setup Guide.
• For spawning newly balanced weapons and testing combat ratings, refer to our Valheim 1.0 New Weapons Guide.