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Elden Ring

Linux Install

Tip

You can just install directly from steam if you haven't downloaded the game already, or don't mind downloading again.

# Copy from windows partition to linux
cp -av /mnt/win/Program Files (x86)/Steam/steamapps/common/ELDEN RING \
  ~/.steam/steam/steamapps/common/ELDEN RING

From steam install Elden Ring - it should validate files instead and download Proton.

Install Seemless Co-Op

Download Seemless Coop and extract to Elden Ring location (Steam ➔ Elden Ring ➔ RMB ➔ Manage ➔ Browse Local Files).

Modify settings to taste.

Game/SeamlessCoop/ersc_settings.ini

0644 {USER}:{USER}

[GAMEPLAY]

; Invaders are other players that will join your world uninvited and try to
; kill you and your party.  0=FALSE  1=TRUE
allow_invaders = 0

; Debuffs (Rot Essence) will be acquired when you die, and will only be
; cured when you sit at a bonfire.  0=FALSE  1=TRUE
death_debuffs = 0

; Spirit summons can aid you in multiplayer.  0=FALSE  1=TRUE
allow_summons = 1

; 0 = Normal | 1 = None | 2 = Display player ping | 3 = Display player soul
; level | 4 = Display player death count | 5 = Soul level AND ping
overhead_player_display = 4

; Whether to skip the intro logos when booting the game. 0 = FALSE 1 = TRUE
skip_splash_screens = 1

; Game volume before initial save load. 0 = MUTE 10 = MAX
default_boot_master_volume = 2

[SCALING]

; Amount of enemy health (%) per player for each enemy. (Default: 35 = 35%
; more enemy health per player)
enemy_health_scaling = 35

; Amount of enemy damage (%) per player for each enemy. (Default: 0 = 0%
; more enemy damage per player)
enemy_damage_scaling = 0

; Amount of enemy posture absorption (%) per player for each enemy.
; (Default: 15 = 15% more per player)
enemy_posture_scaling = 15

; Amount of boss health (%) per player for bosses. (Default: 100 = 100%
; more boss health per player)
boss_health_scaling = 100

; Amount of enemy damage (%) per player for bosses. (Default: 0 = 0% more
; enemy damage towards players, per player)
boss_damage_scaling = 0

; Amount of boss posture absorption (%) per player for bosses. (Default:
; 20 = 20% more boss posture per player)
boss_posture_scaling = 20

[PASSWORD]

; Session password
cooppassword = {SESSION_PASSED}

[SAVE]

;Your save file extension (in the vanilla game this is .sl2). Use any
; alphanumeric characters (limit = 120)
save_file_extension = co2

[LANGUAGE]

;Leave this blank unless you want to load a custom locale file. The mod
; will default to your game language.
mod_language_override = (docs)

Create Co-Op Shortcut

Tip

Existing Elden Ring library covers are located at: ~/.steam/steam/appcache/librarycache/1245620/

Steam → Games → Add a non-steam game

  • Executable: ~/.steam/steam/steamapps/common/ELDEN RING/Game/ersc_launcher.exe
  • shortcut: ELDEN RING (coop)
  • compatibility:
    • Force use of specific steam play compatibility tool: Proton (hotfix)
  • Controller: Setup your controller device
  • Customization:
    • Cover: Library_600x900.jpg
    • Background: Library_hero.jpg
    • Logo: logo.png
    • Wide cover: header.jpg
    • Custom sort name: ELDEN RING (coop)

Launch new game shortcut, accept TOS, and quit (saves not loaded yet).

Transfer Window Saves

Copy profile information from Windows and place in both Steam and Proton directories.

# Copy to Steam Profile.
cp -av /mnt/win/Users/{USER}/AppData/Roaming/EldenRing/ \
  ~/.local/share/Steam/steamapps/compatdata/1245620/pfx/drive_c/users/steamuser/AppData/Roaming/EldenRing/{STEAMID64}/

# Copy to Proton Profile.
cp -av /mnt/win/Users/{USER}/AppData/Roaming/EldenRing/ \
  ~/.local/share/Steam/steamapps/compatdata/{VERY_LARGE_NUMBER}/pfx/drive_c/users/steamuser/AppData/Roaming/EldenRing/{STEAMID64}

Info

The new app id will be very large and mirror ELDEN RING app data.

Relaunch custom game with coop saves.