Modding Lethal Company on the Steam Deck

Quickly get mods working on the Steam Deck using either the r2modman Mod Manager OR installing manually.

Modding LC Manually

Before we begin, we need to set up BepInEx[github.com] which can be downloaded here[github.com].

After downloading, open the file and drag everything into your game folder.

Now your game folder should look something like this.

Go to Lethal Company in your Steam Library and navigate to Properties.

Under Launch Options your gonna copy and paste WINEDLLOVERRIDES="winhttp.dll=n,b" %command%

Boot up the game until you hit this screen then close the game. We needed to run the game once so BepInEx could set itself up.

Your BepInEx folder (which you placed in your game folder) should look like this.

When downloading the mod you want, ensure you download the actual zip.

Open the mod zip file and drag all the files in the plugins folder, which is in your BepInEx folder.
(You just need to drag the .dll files and any folders, but it's idiot-proof to just drag everything.)

If done right, everything should work and you are done.

Modding LC via r2modman Mod Manager

Before starting, it is highly recommended your Lethal Company is installed in the Steam Deck's Internal Storage - not on a MicroSD or External Storage. r2modman mods most likely won't work in Gaming Mode otherwise.

Install r2modman[thunderstore.io] by clicking on Manual Download.

Open the zip file and extract it wherever you want then open r2modman-3.1.45.AppImage

Right-click the AppImage> Properties > Permissions > check Is Executable and click OK.


Search for Lethal Company (You can also click on set as default to start there from now on.)

Select the Default Profile
(This is important if you plan on playing with mods via r2modman in Gaming Mode.)

On the left click Online then find the mod you want and click Download with dependencies.

After you download the mods you want, click Start modded in the top left. Everything should be working if you play in Desktop Mode.

If you want mods to work in Gaming Mode, go to Lethal Company in your Steam Library and navigate to Properties.
Copy and paste
WINEDLLOVERRIDES="winhttp=n,b" %command% --doorstop-enable true --doorstop-target "/home/deck/.config/r2modmanPlus-local/LethalCompany/profiles/Default/BepInEx/core/BepInEx.Preloader.dll" --r2profile "Default"
into your Steam Launch Options.

You should also be able to see the needed launch settings at the bottom of the Help tab

Pontential Issues

The game launches in Gaming Mode without mods using r2modman!
Assuming you followed all previous steps correctly, This usually happens if your game is installed on a MicroSD or somewhere that isn't the Internal Storage. You can try fixing it by dragging the 1966720 folder located at
/home/deck/.steam/steam/steamapps/compatdata/1966720
to
/run/media/deck/01e40a49-5816-44d3-857d-17ada5bc5d4d/steamapps/compatdata
and then clicking Link Here

If that doesn't work, simply install the game in your Steam Deck's Internal Storage. It's also possible your mods are working but conflict with each other and break such as MoreCompany + BiggerLobby.

The game launches without mods after I installed them manually!
You probably made a simple mistake, but it's also possible your mods are working but conflict with each other and break such as MoreCompany + BiggerLobby.

Do my friends also need to install the mods?
Unless the mod is cilent-sided, yes they need them as well. Make sure they all have the mod(s), and everyone's mod(s) are up to date.

Will I get banned for using them?
The developer hasn't commented on their usage as far as I know but as long as you aren't malicious, then no you'll be fine.

Mods just won't work
Many possible reasons but if you just can't get it working, a new game update may have broken or changed things. This has already happened repeatedly in the past.

Recommended Mods

All of these mods were used on v49, they may be abandoned or broken in future updates. Please make sure they support the version you are playing on.

Quality Of Life Mods

AutoFlyToCompany[thunderstore.io] - Automatically fly to the company when there are no days left to meet Quota.
BetterItemScan[thunderstore.io] - Makes it easier to scan a group of items to see the price of each of them listed as well as their combined total.
CollectYourDead[thunderstore.io] - Bodies are automatically collected when teleported back to the ship.
Hold Scan Button[thunderstore.io] - Allows you to hold the scan button to continuously keep scanning.
LethalConfig[thunderstore.io] - Provides an in-game config menu for players to edit their configs.
OrbitRecharge[thunderstore.io] - Automatically recharges all items on the ship and in players' inventories when going into orbit.

General Improvements

CoilHeadStare[thunderstore.io] - Makes the Coilhead slowly turn and face you.

CozyImprovements[thunderstore.io] - Improvements designed to enhance the experience inside the ship.

DiscountAlert[thunderstore.io] - Alerts you which items have a discount when the round begins.

HDLethalCompany[thunderstore.io] - Additional graphics settings such as resolution, anti-aliasing, fog quality, etc.
Helmet Cameras[thunderstore.io] - Adds POV helmet cameras for players, displays on the second large monitor at the ship.

Hitmarker[thunderstore.io] - Shows a hitmarker when you successfully hit an enemy.

JetpackFallFix[thunderstore.io] - Fixes buggy jetpack fall damage logic.
LCMaxSoundsFix[thunderstore.io] - Attempts to fix missing sounds by increasing the max number of simultaneous playing sounds.
MaskedEnemyOverhaul,[thunderstore.io] LC Masked Fix[thunderstore.io], and MaskedEnemyOverhaulFork[thunderstore.io] - Improves the Masked Enemy/Mimic in various ways.

MirrorDecor[thunderstore.io] - Adds a working mirror decoration that you can buy for your ship, useful for viewing modded cosmetics or outfits.

MoreDeathNotes[thunderstore.io] - Updates the Performance Report to include new information.

MoreItems[thunderstore.io] - Changes the max amount of items that the game saves from 45 to 999.

New Entities and/or Maps

Herobrine[thunderstore.io] - Adds Herobrine from Minecraft as an entity that will haunt you. Will attempt to mimic your Minecraft Skin if your Steam username matches your Mojang account. One of my favorite mods.

LC Office[thunderstore.io] - Adds Halt from LSPLASH's DOORS, and Shrimp from Zeekerss' previous game, The Upturned. Feels like real additional content that fits in the game perfectly.

RollingGiant[thunderstore.io] - Adds The Rolling Giant from Kane Pixels' The Oldest View.

ScarletDevilMansion[thunderstore.io] - Adds the Scarlet Devil Mansion from ZUN's Touhou as a possible dungeon to the snow maps.

Scopophobia[thunderstore.io] - Adds the Shy Guy (SCP-096)

Fun/Crazy Stuff

LethalEscape[thunderstore.io] - Allows almost every inside creature to chase you outside.
Mirage[thunderstore.io] - Synced voice mimicking for any enemy, an improved skinwalker mod.

[ミクダヨー]

Great job on this guide man, this helped me so much!

[Mac Ribbs | Twitch]

When I pasted WINEDLLOVERRIDES="winhttp.dll=n,b" %command% on he launch options, it tells me that my computer cannot find it.

[LINKfromTp]

To play modded in gaming mode.
You need to set this up in desktop where you go to the game then goto: settings > properties > Launch Options: then there is a code you can run, then copy and paste this in.

--doorstop-enable true --doorstop-target "Z:/home/deck/.config/r2modmanPlus-local/LethalCompany/profiles/Default/BepInEx/core/BepInEx.Preloader.dll" -r2profile "Default"

Then you should be good to go.
If you need an explanation Here's the post my buddy on deck found.
https://www.reddit.com/r/SteamDeck/s/kBCxzZzEYx

[Captain Diagram]

Unsure about the manager but any mod installed manually should work in Gaming Mode.

[Gamerbird1120]

Is there a way to have it modded in gaming mode?

[Reptosaur963]

Starting over, I had fixed the resolution by using in game setting and putting it into the “Windowed” option. However I still was missing a compatdata file for the game

[Reptosaur963]

It happened when I had set up the mon manager, it worked fine before that step

[Captain Diagram]

I have no idea what could have caused that, stupid question but has deleting the game folder and reinstalling fixed it for at least vanilla gameplay? Also, have you tried messing with the resolution in the game settings? Did this happen after installing any mods in particular or just after setting up the manager?

[Reptosaur963]

I had followed instructions but now my game wont fill the whole screen, only being a square section. Launching modded from r2modman says Lethal Company compatibility data “does not exist in Steam’s specified location” and failed to find directory: /run/media/mmcblk0p1/steamapps/compatdata/1966720 it also says that I have not started the game once, yet I have started from steam and r2modman’s vanilla since. Please help. I would at least like to still play vanilla in a normal Steam Deck aspect ratio. Thank you.

[Tears of Cyanide]

For me, I needed to use another command that uses a profile in the mod manager, seperated by a space from the first commend.
From the thunderstore settings I scrolled down until I saw "Set Launch Parameters" I copy & pasted the first code "--doorstop-enable true...etc" for modded games then pasted it AFTER the first code in Lethal Company's Launch Settings with a space in between and suddenly the game is properly loading mods.