Valheim Crossplay Configuration
Should you use -crossplay? Answer 3 questions and get a personalized recommendation with a startup command fragment.
Decision Wizard
1. Do you need Xbox / GamePass / Microsoft Store players to join?
2. Do you want to use BepInEx mods (ValheimPlus, Epic Loot, etc.)?
3. How many players?
Platform Compatibility
| Platform | Without -crossplay | With -crossplay |
|---|---|---|
| Steam | Yes | Yes |
| Xbox (console) | No | Yes |
| GamePass (PC) | No | Yes |
| Microsoft Store | No | Yes |
| BepInEx mods | Yes | No |
There is currently no Epic Games Store version of Valheim.
Platform ID Formats for adminlist.txt
Steam
76561198000000000
SteamID64 — 17 digits starting with 7656119. No prefix. Find via F2 in-game or steamidfinder.com.
Xbox / GamePass
Xbox_2535416401464117
Must include the Xbox_ prefix. Find via F2 in-game while crossplay is enabled.
Port Behavior
Both crossplay and non-crossplay modes use the -port value and the next two ports. With default -port 2456, the server listens on ports 2456, 2457, and 2458 (UDP). Open all three in your firewall. The -public flag (0 or 1) controls Steam/PlayFab server listing and is not affected by crossplay mode.