Source-checkedCreatures & NPCs

Lockstep

by MilkyTeam · for Valheim

The next boss stays sealed until every player on the server has defeated the previous one. Server synced.

1.1KDownloads
10d agoLast updated
BepInExLoaders
ThunderstoreSource

About Lockstep

From Thunderstore

The next boss stays sealed until every player on the server has defeated the previous one. Server synced.

Lockstep

The next boss stays sealed until every player on the server has defeated the previous one. Fast players wait for the group; nobody skips ahead.

Features

  • Altar gate: a boss altar opens only once everyone has defeated the boss before it.
  • Altar hover: every gated altar says whether it is open or which players the group is waiting for; the offering

is kept.

  • Credit per player: everyone who hit the boss, plus everyone within a set distance when it dies.
  • Roster: fills itself as players join; players away for a set number of days stop holding the group back.
  • Late joiners: new players catch up with everything the world has already cleared, or earn each boss themselves.
  • Safe mid-playthrough: bosses already defeated count as cleared for everyone.
  • Spawn guard: a sealed boss cannot spawn even if another mod gets past the altar.
  • Open world: biomes, portals, dungeons and crafting stay open, and the game's own boss progress is untouched.
  • Boss chain: Eikthyr, The Elder, Bonemass, Moder, Yagluth, The Queen and Fader, in a YAML file; add modded bosses or

change the order.

Console commands

  • lockstep status: each altar, open or who it waits for, and every player's credit.
  • lockstep grant <player> <boss>: gives a player credit for a boss (admins).
  • lockstep revoke <player> <boss>: takes that credit away (admins).
  • lockstep ignore <player> / unignore: the player never holds the group back, or counts again (admins).
  • lockstep forget <player>: removes a character from the roster; joining again starts fresh (admins).
  • charter status: whether the server's settings bind yours.

Install

Needed on the server and every client; the server refuses clients without it, and a player on a server without it is told so. Install with r2modman or the Thunderstore app, or put Lockstep.dll in BepInEx/plugins. Replaces OathBound (up to 0.1.2): remove it, its config files are not read.

Configuration

BepInEx/config/com.Lockstep.cfg and LockstepChain.yml; the server keeps its roster in Lockstep.<world>.roster.yml. Every setting is described in the file and applies without a restart; the server's values bind every player (Lock Configuration). The Wiki tab has the details. Translate: save a copy of English.yml as Lockstep.translations.<Language>.yml in BepInEx/config.

Links

Discord: https://discord.gg/Q2sMPGQ4T3

Bugs and ideas: https://github.com/geraldjglasgow/ValheimMods/issues (name the mod and version). Licence: GPL-3.0.

Shout outs

  • The BepInEx and Harmony teams, for the tools every Valheim mod stands on.
  • Iron Gate Studio, for Valheim.
  • Thunderstore, for hosting this page.
  • The Valheim modding community, for the hard work and dedication that keeps enhancing an already great game.
  • Every modder who keeps their mods open source so others can collaborate, learn and build on them.
  • The co-op group that kept waiting at the Elder altar for the one player who was still at work.

Highlights

From source data

Loaders

Runs on BepInEx.

Footprint

Rated a light load on a server.

Last update

Its author last shipped an update 10d ago.

Lockstep on Nxeon

From our catalogue
One-click install
Supported on Nxeon Valheim servers, for BepInEx servers. We download it from Thunderstore, place it, and restart the server.
Server side
Optional on the server
Server type needed
BepInEx
Server load
light
Smallest plan we suggest
Valheim — 4 GB (4 GB RAM). This follows our own load rating above, not a benchmark.
Latest build
0.6.1, released 2026-10-25

Game versions by loader

LoaderGame versionsNewest
BepInEx

From 13 recorded builds of Lockstep.

Recent builds

BuildReleasedGame versionsLoaders
0.6.12026-10-25n/aBepInEx
0.6.02026-10-22n/aBepInEx
0.5.12026-10-17n/aBepInEx
0.5.02026-10-08n/aBepInEx
0.4.12026-10-07n/aBepInEx
0.4.02026-10-06n/aBepInEx

Dependencies

Declared by the newest build that lists any. Required ones are installed with it on one-click installs.

Run Lockstep on a Valheim server

Pick a server or deploy a new one above; it is installed in one click.

What kind of mod it is

From the catalog
Listed on Thunderstore as “Content”

Creatures & NPCs

Adds or changes creatures, NPCs and how they behave.

Works on a server

From source side support

Thunderstore lists server-side support for Lockstep as optional: it can run on a server, but isn’t required there.

Compatibility

Game
Valheim
Loaders
BepInEx
Runs on
Serveroptional on the server
Requires
One-click install needs a BepInEx server.

Verified at the source

  • ✓ThunderstoreOfficial listing, checked 2026-10-26Open ↗
  • ✓AuthorMilkyTeam, as published on Thunderstore
  • ✓LicenseNot published by the sourceFree

Lockstep, answered

Generated from the mod’s own source data.

Do my players need to install Lockstep?

Thunderstore lists server-side support for Lockstep as optional: it can run on a server, but isn’t required there.

Which loaders does it support?

BepInEx.

Is it free?

Yes. Lockstep is free to download from Thunderstore.

How do I add it to my Nxeon server?

Use “Add to a server” on this page, or open NxLabs from your dashboard. We install it, restart your server and switch it on.

NxLabs

Run Lockstep on a Valheim server.

Deploy in about a minute from $9.99 a month, then add Lockstep in one click.