Source-reviewed guide
Valheim 1.0: Deep North, Platforms, Saves and Crossplay
Valheim 1.0 is released. Review Deep North, supported platforms, existing-world generation, achievements, mods, downloads, and September hotfixes.
Reviewed 2026-09-17
Valheim 1.0 shipped on September 9, 2026. Deep North is playable, and Iron Gate has published the release notes and September hotfixes. Use the patch archive for individual changes and Updates for acknowledged issues.
Release status
| Topic | Official guidance |
|---|---|
| Main biome | Deep North |
| Boss | Kall Fimbulbringer |
| Multiplayer | 1–10 players, according to the FAQ |
| Crossplay | Supported across platforms |
| Existing saves | Usable; new biome generation requires unexplored areas |
| Achievements | Introduced in 1.0; see the later Steam opt-in change |
Platforms and storefronts
Iron Gate's FAQ lists Steam on Windows, Linux and Mac; Mac App Store; Humble on Windows, Linux and Mac; Microsoft Store on Windows; Xbox One and Series X|S; PlayStation 5; and Nintendo Switch 2. See the PS5 guide and Switch 2 guide for platform details.
Crossplay and saves
Crossplay lets players join across platforms; it does not transfer purchases or imply general save synchronization. The FAQ identifies Xbox saves accessed through the Microsoft Store PC version as the save-access exception. Use the crossplay guide for server configuration.
Existing worlds remain usable. Proper new biome generation depends on unexplored terrain, and Iron Gate recommends a fresh start. The world decision guide covers preserving established builds versus starting again.
Deep North content
The release lists snow and ice mechanics, Snow Shovel, Frost Foundry, Frigid Kiln, Standing Loom, named creatures and dungeons, new gear families, and Kall Fimbulbringer. See the Deep North guide and region reference.
Documentation status — September 17, 2026: the cited notes do not publish complete boss statistics, attack phases, loot tables, or recipe quantities. Named items are not evidence of particular drops or progression requirements.
Achievements and mods
Achievement tracking starts with the installed release. The July FAQ describes cheat flags and temporary restrictions; the September 11 Steam hotfix adds an opt-in after developer-command or mod use. Read the achievement guide for the command and platform scope.
There is no official mod support, Steam Workshop support, or console mod support for 1.0. Test each mod against the installed version; the mod checklist provides a backup and testing workflow.
Downloads and price
The FAQ's download estimates are about 4.3 GiB on most platforms, 3.0 GiB on Xbox One, and 6.5 GiB on the Mac App Store and Microsoft Store. These are estimates, not current installed-size guarantees. Check the requirements guide and your storefront.
Iron Gate announced a US base price of $29.99 with regional variation. Existing Early Access copies update without a second game purchase.
Dedicated servers
The release notes describe chunked world saves, network and world-generation improvements, and IPv6 fixes. The Steam hotfix also repairs legacy banlist and whitelist ID handling. Back up complete saves and configuration, update server and clients, then test loading, joining, permissions, and saving. Follow the migration checklist and server update guide.
Sources: Official 1.0 patch notes, September 11 hotfix, 1.0 FAQ.