Valheim 1.0 Guide: Do Your Old Saves Still Work, and Should You Start Over?

Valheim reached 1.0 on September 9, 2026, and if you already own it, the short answer to the question you’re actually asking is: no, your old save doesn’t stop working — but there’s a real caveat worth understanding before you decide whether to keep it or start fresh.

Do You Need to Start a New World?

No. Iron Gate’s own 1.0 FAQ is direct about this: “your old saves will still be where you last left them, and you can continue to play with them.” Nothing about existing worlds breaks at launch.

The nuance is generation, not compatibility. The new Deep North biome and its content only generate correctly in parts of the map nobody has explored yet. If your old world has already been fully mapped, there may be little or no room left for Deep North to appear naturally. That’s why Iron Gate recommends starting over “for the best experience” — it’s a recommendation about content generation, not a warning that old worlds are broken.

What Happens to Old Saves, Specifically

Early Access owners don’t need to buy the game again — existing copies simply update to 1.0. Your character and world files stay exactly where they are. The only thing that changes is what can newly generate: unexplored regions of an old map can still produce Deep North content, while thoroughly explored maps may need a fresh start to actually experience it.

What Deep North Adds

Deep North is Valheim’s major new biome tied to the 1.0 release, an icy region at the northern edge of the map. Confirmed additions include new enemies like the Gammeltrolls, the underground Elakingar areas, Winding Tunnels dungeons, and new gear built around surviving the cold — Nord-themed weapons, a new shield, and the Frostfire crossbow among them. A final boss exists in the biome; Iron Gate hasn’t published a detailed breakdown of story or boss specifics beyond confirming the content exists, so this guide isn’t going to guess at mechanics from trailers or datamines.

Can You Go Straight to Deep North?

Yes — Iron Gate’s FAQ doesn’t lock the biome behind anything technical. You’re not required to progress through earlier biomes first in a way that’s different from before. The “start over” recommendation is about giving the new content unexplored territory to generate in, not a gate you have to unlock.

Crossplay vs. Cross-Save — These Are Different Things

This is the distinction most likely to trip people up. Crossplay — playing together across platforms — is fully supported at 1.0 across Steam (Windows/Linux/Mac), Mac App Store, Humble Store, Microsoft Store, Xbox One, Xbox Series X|S, PlayStation 5, and Nintendo Switch 2. You and a friend on different platforms can play in the same world.

Cross-save — your own save file following you between platforms — is much narrower. Per Iron Gate’s FAQ, Xbox players can access saves from a PC only when launching through the Microsoft Store version specifically. “Beyond this, there will be no cross platform sync for your save files.” A Steam save doesn’t follow you to PS5, and a PS5 save doesn’t follow you to Switch 2. Crossplay working doesn’t mean your progress travels with you — those are two separate systems.

What Happens to Mods

There’s no official mod support in 1.0, and Iron Gate can’t guarantee existing mods will keep working — mod authors may need time to update their projects after launch. Steam Workshop isn’t part of 1.0. Console versions don’t get mod support at launch at all. If you’re mod-dependent, expect a gap before your usual setup is confirmed stable again.

How Achievements Work

Valheim gets a full achievement system at 1.0, but tracking only starts once you’ve installed the 1.0 update — earlier accomplishments aren’t automatically retrofitted. Using most console commands flags your character and world as permanently ineligible for achievements going forward (the “freefly” camera command is the one confirmed exception). Hammer-mode, the build-anywhere/no-cost creative option, counts as a temporary cheat for this purpose too, so turning it on blocks certain achievements while it’s active.

Platforms, Player Count and Price

Valheim 1.0 is available on Windows, Linux, Mac, Xbox One, Xbox Series X|S, PlayStation 5, and Nintendo Switch 2, with PS5 and Switch 2 launching alongside the update as new platforms. Worlds still support 1 to 10 players, unchanged from before 1.0. The game’s price moves to $29.99 at 1.0 — regional pricing will differ outside the US, and existing owners keep their copy at no extra cost regardless of the new price.

What’s Not in 1.0

Worth knowing so you don’t go looking for it: the Ocean biome isn’t getting a dedicated overhaul at 1.0. Iron Gate’s FAQ is specific that “the 1.0 update focuses on the Deep North biome” — Ocean stays as it was.

Should You Start Fresh or Keep Your World?

Start fresh if you want the cleanest Deep North generation and want to experience the game’s full progression the way Iron Gate designed it for 1.0. Keep your existing world if your builds and progress matter more to you than seeing every corner of the new biome, or if your map still has meaningfully unexplored territory where Deep North can generate anyway. Neither choice is wrong — it depends on what you’d actually miss more.

If you’re tracking other upcoming survival games, our coverage of Stranded Deep 2’s desert river reveal covers another one in development. For more gaming coverage, visit our Gaming hub.