Patch 1.0.20 is announced October 15. Iron Gate warns that Mac App Store delivery is delayed and crossplay with other platforms will not work until that build catches up. Finish available updates, then start with a small test: one host and one friend. For mixed platforms, enable crossplay and use the host’s current join code. If joining fails, change one setting at a time and preserve the original save before testing mods or a new server configuration.
The October 15 note says Mac App Store players cannot crossplay with other platforms until the delayed patch arrives there. This supersedes older general statements that crossplay continues through every staggered rollout. Check the current Mac App Store update and the actual host/client versions; no completion time or Kingy connection test is supplied.
The same patch fixes dedicated servers running at an uncapped frame rate when v-sync was enabled in the client on the same computer, and Xbox One / Xbox Series settings failing to save between sessions for some users. These fixes do not establish a universal performance or settings-recovery result.
The updated September 11 notice says the delayed Switch 2 patch has arrived. The October 6 announcement says crossplay continues while 1.0.17 reaches each platform over several days. It does not confirm that every platform already has the patch. These statements supersede the earlier delay notice; they do not certify every player’s network or mods.
Publisher guidance checked October 8; installed versions and connections were not tested
Platform
Published guidance
What to check
Nintendo Switch 2
The delayed patch has arrived; crossplay is restored according to Iron Gate.
Finish available updates and test the current join code.
Steam, Xbox and other supported platforms
Iron Gate says crossplay continues during the staggered 1.0.17 rollout.
Record client and server versions; platform version numbers may differ.
A Steam client or server left on an older branch
The earlier Switch 2 delay no longer justifies the temporary downgrade.
Back up first, check the selected branch and follow current publisher instructions.
The Steam default_old workaround was temporary advice for the earlier Switch 2 rollout delay. The updated official notice reports that delay resolved. It is retained here as historical context, not a recommended downgrade.
Finish available updates on the clients and host, then retry with one friend and the current join code.
If Steam was moved to an older branch for the former Switch 2 delay, back up the world and characters before changing it. Check the current publisher guidance with the host.
Record client and server versions and the exact error if joining still fails. Continue with the connection checks below; a publisher crossplay announcement does not prove an individual setup works.
Iron Gate’s 1.0 FAQ describes crossplay for up to ten players. Check the dated platform guidance above before following these connection steps. Menu wording may differ by platform.
The host starts the intended world with multiplayer and crossplay enabled, then checks the current join code in the pause menu.
The joining player opens Join Game, chooses Add server and enters that code. Confirm the password separately if the host set one.
Join with one player first. Verify the world name and a familiar landmark before inviting the rest of the group.
On Steam 1.0.12, Iron Gate reports that banlists and whitelists accept legacy Steam_ identifiers again as well as newer V_ identifiers. If an existing permissions file appears ignored, confirm the installed server branch before rebuilding the list. The same hotfix addresses a crash while accessing an unloaded zone; it does not establish that every connection failure is fixed.
The official manual distinguishes Steam networking from the crossplay relay. A crossplay server uses the -crossplay argument and cannot be joined using a local or loopback IP address; use the current join code or the documented public connection method.
For a Steam-backend server, the published default port range is 2456–2457. Follow the current manual and your router documentation. Crossplay uses a relay and does not require that port-forwarding setup.
Keep a separate copy of a customized launch script because updates can replace the original. Read the manual supplied with the installed server before making configuration changes.
Crossplay does not provide universal save synchronization. Iron Gate documents shared saves between Xbox and the Microsoft Store PC version; other platform combinations do not receive automatic cross-platform save sync.
Before moving a world, identify its current owner and make an independent backup. Confirm the migrated world in a test session before resuming normal play. Do not treat a cloud-sync prompt as proof that the right version of the world is stored safely.
Check the save-sync limits above. Being able to join a friend does not transfer your character between every platform.
The unmodded test works but the normal world does not.
Stop testing on the only copy of the normal save. Keep the backup and compare the mod versions and requirements with their maintainers’ current instructions.
I can connect from outside but not using a local address.
Check whether the server uses crossplay. The official relay instructions exclude local and loopback addresses.
Sources · 10official · checked 15 Oct 2026 · Research-based
Iron Gate: Patch 1.0.20 ↗Trophy chance increases with monster star level; rare-drop logic persists between sessions; old cheated flags reset; Forge of Potential exploit, dedicated-server frame-rate and Xbox settings fixes. Mac App Store delay temporarily prevents crossplay with other platforms.official ·
Iron Gate: Hotfix 1.0.10 & 1.0.12 ↗Updated crossplay announcement, September 11 repair changes and achievement opt-in. Historical version numbers are not a current installed-version inventory.official ·
Iron Gate: Patch 1.0.15 ↗Terrain duplication/seam fix, falsely marked items awaiting correction, crossplay during rollout, the limits of the 1.0.12 conversion fix, and recovery from an earlier world backup with possible progress loss.official ·
Iron Gate: Patch 1.0.17 ↗World-save chunk splitting object-loss fix, invalid item styles reset to default, placeholder text and credits fixes, and continued crossplay during the platform rollout.official ·
Iron Gate: Valheim 1.0 FAQ ↗Crossplay across platforms, one to ten players, Xbox/Microsoft Store save continuity, and mod compatibility limits.official ·
Iron Gate: Crossplay FAQ ↗Host join codes, the Join Game / Add server workflow, console crossplay settings and Xbox dedicated-server limitations.official ·
Iron Gate: dedicated server guide ↗Steam and crossplay backends, relay behavior, local-address limitations, server startup, permissions and configuration preservation.official ·
Iron Gate: Patch 1.0.16 ↗The publisher’s 1.0.16 staggered-delivery and continued-crossplay notice.official ·
Iron Gate: Patch 1.0.14 ↗September 17 publisher notes: control options and guest manual-save fix. Publisher warns rollout to all platforms takes several days; check the installed version.official ·
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