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Quantum Space Buddies (QSB) is a multiplayer mod for Outer Wilds. The mod uses the OWML mod loader and customized UNET code (internally referred to as QNet or QuantumUNET) for networking.

Spoilers within!

License

QNet code adapted in part from Unity Technologies' UNET.

Copyright (C) 2020 - 2021 :

  • Henry Pointer (_nebula or misternebula)
  • Will Corby (JohnCorby)
  • Aleksander Waage (AmazingAlek)
  • Ricardo Lopes (Raicuparta)

This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details.

You should have received a copy of the GNU Affero General Public License along with this program. If not, see https://www.gnu.org/licenses/.

Installation

Easy installation (recommended)

  • Install the Outer Wilds Mod Manager;
  • Install Quantum Space Buddies from the mod list displayed in the application;
  • If you can't get the mod manager to work, follow the instructions for manual installation.

Manual installation

Playing as a client

  • Log into Steam, and have Steam running in the background.
  • Run the game.
  • On the title menu, select "CONNECT TO MULTIPLAYER".
  • Enter the SteamID of the host.
  • Hit connect, and pray.

Playing as a host

  • Log into Steam, and have Steam running in the background.
  • Run the game.
  • On the pause menu, select "OPEN TO MULTIPLAYER".
  • Give your SteadID to your clients.

Frequently Asked Questions

Requirements

  • Steam account.
  • Latest version of OWML.
  • Latest version of Mod Manager. (If using)
  • Latest version of Outer Wilds. (Epic version preferred, as Steam version is untestable. We cannot guarantee QSB, or OWML, will work on cracked/pirated versions of Outer Wilds. Do not come asking us for help when using pirated versions.)
  • Fast and stable internet connection, upload and download.
  • Above minimum Outer Wilds system requirements.

Compatibility with other mods

TL;DR - Don't use any mods with QSB that aren't marked as QSB compatible.

QSB relies on exact orders of objects found using Resources.FindObjectsOfTypeAll to sync objects, so any mod that changes the hierarchy at all risks breaking QSB. Also, QSB relies on certain game events being called when things happen in-game. Any mod that makes these things happen without calling the correct events will break QSB. Some mods will work fine and have been tested, like CrouchMod. Others may only work partly, like EnableDebugMode and TAICheat.

Will you make this compatible with NomaiVR?

Short answer : No.

Long answer : Pay me enough money, and maybe I'll consider it.

Why can't a Steam game connect to an Epic game, and vice versa? Do you hate Steam/Epic?

QSB is incompatible between game vendors because of how it works at a base level. Not because I dislike Steam or Epic.

Technical explanation : QSB relies on the orders of lists returned by certain Unity methods to be the same on all clients. For Unity objects, these are (probably) ordered by AssetID or InstanceID. These IDs are different across different game builds. The Epic and Steam versions are different builds. Therefore, the lists are ordered differently and everything breaks.

Why do I keep getting thrown around the ship?

Boring boring physics stuff. The velocity of the ship is synced, as well as the angular velocity. However, this velocity is not also applied to the player. (Or it is sometimes. I don't 100% know.) This means the ship will accelerate, leaving the player "behind". Which makes you fly into the walls alot. So really there's nothing we can do about this. I disabled damage by impact inside the ship, so if you die inside the ship while it is flying then that is a bug.

What's the difference between QSB and Outer Wilds Online?

TL;DR - QSB is multiplayer co-op, Outer Wilds Online is multiplayer not not co-op.

QSB is a fully synced game. The other players are actually there in the world, and can affect things. The loop starts/ends at the same time for everyone, and you share ship logs / signal discoveries.

Outer Wilds Online is easier to set up, but much more basic in its features. The other players cannot affect your game, and do not contribute to anything in your save. The loop is entirely per-player.

Why would someone make this mod? Seems like a lot of effort for no reward.

Good question.

Let me know if you find an answer.

Development Setup

  • Download the Outer Wilds Mod Manager and install it anywhere you like;
  • Install OWML using the Mod Manager
  • Clone QSB's source
  • Open the file DevEnv.targets in your favorite text editor
  • Edit the entry <GameDir> to point to the directory where Outer Wilds is installed
  • Edit the entry <OwmlDir> to point to your OWML directory (it is installed inside the Mod Manager directory)
  • Edit the entry <UnityAssetsDir> to point to the Assets folder of the QSB unity project
  • Open the project solution file QSB.sln in Visual Studio
  • If needed, right click References in the Solution Explorer > Manage NuGet Packages > Update OWML to fix missing references
    • Use this to create Assembly-CSharp_publicized.dll, if you don't already have it
  • Run this to stop tracking DevEnv.targets: git update-index --skip-worktree DevEnv.targets

To fix the references, right click "References" in the Solution Explorer > "Add Reference", and add all the missing DLLs (references with yellow warning icon). You can find these DLLs in the game's directory (OuterWilds\OuterWilds_Data\Managed);

After doing this, the project references should be working.

If Visual Studio isn't able to automatically copy the files, you'll have to copy the built dlls manually to OWML.

It is recommended to use the Epic version of Outer Wilds, as you cannot run multiple versions of the Steam version.

A powerful PC is needed for development, due to the high amount of RAM and CPU needed to run 2 or 3 instances of modded Outer Wilds.

It is also recommended to lower all graphics settings to minimum, be in windowed mode, and lower resolution to roughly a quarter of your monitor space. This lets you run multiple instances of Outer Wilds to quickly test QSB.

Warning : Mod development can lead to unexpected errors in your computer system.

  • When editing the networking code, mistakes can lead to QSB overwhelming your network connection with excess packets.
  • Too high RAM usage will lead to Outer Wilds sticking at ~31% loading, then crashing.
  • There have been instances of graphics cards crashing, and needing to be disabled/re-enabled from Device Manager.

Authors and Special Thanks

Authors

Contributers

Special Thanks

  • Thanks to Logan Ver Hoef for help with the game code.
  • Thanks to all the people in the Outer Wilds Discord for helping in public tests.
  • Special thanks (and apologies) to all the people in the #modding channel, which I (_nebula) have been using as a virtual rubber duck.

Dependencies

Help / Discuss development / Whatever

Join the Outer Wilds Modding Discord, we have a nice #mod-support channel for any mod help, and a other channels to discuss modding!