How to Host The Adventure of Valkyriens Server: Forge 1.20.1 Setup Guide

Start with at least 7 GB of RAM dedicated to the server — that's the recommended floor for The Adventure of Valkyriens on Forge 1.20.1, driven by Valkyrien Skies 2's physics simulation for ship structures plus the weapon and ship-system addons running alongside it. Going lower risks tick stalls the moment a ship with real mass starts moving.

Import the modpack from its official distribution (CurseForge or Modrinth) rather than copying a client's mods folder by hand — The Adventure of Valkyriens pins specific Valkyrien Skies 2, weapon-addon, and ship-system-addon versions, and a mismatched client export will desync ship physics or crash on connect.

Watch the server log through first boot until Forge finishes loading all mods and Valkyrien Skies 2 initializes its physics engine cleanly — VS2-based packs are known for long first-boot mod loading, and any mod loading errors here usually mean a ship won't render or collide correctly once players start building.

Only invite players once you've seen one full clean startup with no Valkyrien Skies 2 or addon errors in the log — the first ship someone assembles will immediately stress-test the physics engine, so you want a stable baseline before that happens.

Take a backup before importing a world, updating Valkyrien Skies 2 or the weapon/ship-system addons, or changing physics-related configs — a botched update can corrupt in-progress ship builds, and losing a half-built warship is the kind of progress players don't want to redo.