Source-checkedGameplay & overhauls

Bretaheim

by tarbaby · for Valheim

ALPHA. Ultima V: Warriors of Destiny rebuilt inside Valheim, read at runtime from your own copy of Ultima V (not included).

30Downloads
13d agoLast updated
BepInExLoaders
ThunderstoreSource

About Bretaheim

From Thunderstore

ALPHA. Ultima V: Warriors of Destiny rebuilt inside Valheim, read at runtime from your own copy of Ultima V (not included).

Bretaheim (alpha)

Ultima V: Warriors of Destiny rebuilt inside Valheim: Britannia as the world, its towns, castles and dungeons to walk into, its people on their daily schedules with their original conversations.

> Alpha. Most of the game is in and playable from Iolo's hut to the Underworld, but expect rough > edges, missing pieces and changes between versions. Play it in a new world. Bug reports are welcome > on GitHub.

You need your own copy of Ultima V

No Ultima V data ships with this mod. It reads the game files (DATA.OVL, BRIT.DAT, TOWNE.DAT, ...) from your own copy, for example the GOG release, at start-up.

  1. Install the mod (r2modman or manually, together with BepInExPack and Jötunn).
  2. Start Valheim once, then quit. This creates BepInEx/config/tarbaby.bretaheim.cfg.
  3. Set UltimaVDirectory in that file to the folder that holds DATA.OVL, for example

C:\GOG Games\Ultima 5 or ~/Ultima 5.

  1. Start Valheim and create a new world. New worlds are Britannia (their seed starts with

"Britannia"); worlds with other seeds stay vanilla Valheim. If the folder is wrong, the BepInEx log lists the missing files and the mod stays disabled.

What is in it

  • Britannia from BRIT.DAT at 32 m a tile, with the Underworld beneath it as a second continent.
  • Towns, castles, keeps and dwellings built from the original maps, floor by floor, with their

furniture, signs, locked doors, secret walls and the harpsichord.

  • Townsfolk on their original schedules, with their conversations, shops, inns, healers,

shipwrights, stables and guards (fire a town's ballista and see what happens).

  • The Avatar: Hildir's gypsy questions, Ultima stats on the Tab screen, karma, food, experience

and levels. Dying costs experience, not items: Lord British raises you in his throne room.

  • Magic: reagents, mixing, the 48 spells, scrolls and potions (cast with Z).
  • Monsters with their Ultima names and colours, random encounters by the original's rates.
  • Dungeons, the moongates and moons, the Shadowlords, ships, skiffs, horses and the magic carpet,

the shrines and the story's scenes up to Lord British's rescue.

Console

Press F5 and type u5 for the commands: u5 quest, u5 karma, u5 time, u5 moons, u5 intro, u5 dump <table>, and more with devcommands on.

Multiplayer

Every player and the server need the mod (the same minor version) and their own Ultima V files.

Highlights

From source data

Loaders

Runs on BepInEx.

Footprint

Rated a light load on a server.

Last update

Its author last shipped an update 13d ago.

Bretaheim 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 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
0.3.3, released 2026-10-23

Game versions by loader

LoaderGame versionsNewest
BepInEx

From 4 recorded builds of Bretaheim.

Recent builds

BuildReleasedGame versionsLoaders
0.3.32026-10-23n/aBepInEx
0.3.22026-10-23n/aBepInEx
0.3.12026-10-22n/aBepInEx
0.3.02026-10-22n/aBepInEx

Dependencies

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

Run Bretaheim 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”

Gameplay & overhauls

New mechanics, content and overhauls that change how the game plays.

Compatibility

Game
Valheim
Loaders
BepInEx
Requires
One-click install needs a BepInEx server.

Verified at the source

  • ✓ThunderstoreOfficial listing, checked 2026-10-23Open ↗
  • ✓Authortarbaby, as published on Thunderstore
  • ✓LicenseNot published by the sourceFree

Bretaheim, answered

Generated from the mod’s own source data.

Which loaders does it support?

BepInEx.

Is it free?

Yes. Bretaheim 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 Bretaheim on a Valheim server.

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