How to Install a Deadlock Mod

Install Deadlock mods with Deadlock Mod Manager or Grimoire, or by hand: find the addons folder, name the files, add one gameinfo.gi line.

Pick a manager below and mods install with one click. Or scroll to installing by hand, which works for every mod, including the ones with no one-click button.

Installing with a mod manager

Both managers are free and install the same mods. Pick either column and follow it top to bottom.

Deadlock Mod Manager

Download Deadlock Mod Manager

File: Deadlock.Mod.Manager_1.1.0_x64-setup.exeall downloads

Extra info

Signed. Stable Windows builds go through a SignPath Foundation certificate; the rolling nightly tag is test-signed.

Windows: Signed installer, stable releases only
Also runs on: Linux (.deb, .rpm, Flatpak), best-effort
Licence: GPL-3.0
Mods from: GameBanana

Run the installer from the Download button above.
Open the manager once and let it find Deadlock. If it asks, the game is usually at C:\Program Files (x86)\Steam\steamapps\common\Deadlock.
On the mod you want, press Open with Deadlock Mod Manager and allow the browser prompt.
Restart Deadlock.

Grimoire

Download Grimoire

File: Grimoire-Setup-1.27.1.exeall downloads

Extra info

Not signed yet. Windows shows an Unknown Publisher warning on first run; releases ship SHA256SUMS and build attestations.

Windows: Unsigned installer, SmartScreen warns
Also runs on: Linux (AppImage, .deb, Flatpak, apt, AUR, Nix)
Licence: MIT
Mods from: GameBanana

Run the installer from the Download button above. When SmartScreen warns, choose More info, then Run anyway.
Open Grimoire once. If it did not find Deadlock on its own, set the game path in Settings.
On the mod you want, press Open with Grimoire and allow the browser prompt.
Press Enable on the new download.
Press Launch Modded, or start the game from Steam as usual.

Installing by hand

Use Deadlock Mod Manager or Grimoire if you can; a manager is one click per mod and no file editing. Install by hand when a mod has no one-click button, or you would rather manage the files yourself.

Press Download on the mod and unzip it.
In Steam, right-click Deadlock, then Manage, then Browse local files. From there open game\citadel\addons. If there is no addons folder, create it.
Move the unzipped .vpk file there and rename it pak01_dir.vpk. If the download holds several .vpk files, rename them as a set: pak01_dir.vpk, pak01_000.vpk, pak01_001.vpk. Your second mod takes pak02, and so on.

Back in the citadel folder, open gameinfo.gi in Notepad and add one line above Game citadel, so the block reads:

SearchPaths
{
Game_Language        citadel_*LANGUAGE*
Game_LowViolence     citadel_lv
Game                 citadel/addons
Game                 citadel
Game                 core
}

Close Deadlock completely and start it again.

If mods stop working after an update

Game updates can rewrite gameinfo.gi and drop the citadel/addons line, so every mod vanishes at once. Re-add the line, or let your manager repair it. Fixing skins that stopped working covers the rest.

On Linux

Everything above works under Proton. Browse local files in Steam opens the same folders; the path is typically ~/.local/share/Steam/steamapps/common/Deadlock/game/citadel/. Both managers have Linux builds on the same release pages.

How to Install a Deadlock Mod

Installing with a mod manager

Installing by hand

If mods stop working after an update

On Linux

More Deadlock mod guides