

I tried different guides, and eventually went to the source, this worked great for me.
From SE Discord, posted by “lord.of.woe”:
Space Engineers Linux Installation Guide Last Updated 2025-07-24
Prerequisite Packages
git
wget
WINE
Step 1: Install GE-Proton9-25 and GE-Proton10-X. There are several methods you can use to install this, but this guide uses only common terminal commands. (Edit: I used Protonplus for this)
wget -qO- https://github.com/GloriousEggroll/proton-ge-custom/releases/download/GE-Proton9-25/GE-Proton9-25.tar.gz | tar xzvf - -C "${HOME}/.steam/steam/compatibilitytools.d"
wget -qO- "$(curl -s https://api.github.com/repos/GloriousEggroll/proton-ge-custom/releases/latest | grep "\"browser_download_url\": \".*\.tar\.gz\"" | cut -d'"' -f4)" | tar xzvf - -C "${HOME}/.steam/steam/compatibilitytools.d"
Step 2: Remove local Space Engineers data. ‼️ WARNING: THIS WILL PERMANENTLY DELETE ALL SAVES, GAME DATA, ETC. THAT ARE NOT BACKED UP TO THE STEAM CLOUD OR ELSEWHERE. ‼️
export STEAMAPPS_PATH=${HOME}/.steam/steam/steamapps # edit as necessary
rm -rf ${STEAMAPPS_PATH}/compatdata/244850
Step 3: Restart Steam
Step 4: Change the compatibility layer in Steam to GE-Proton9-25.
Step 5: Launch Space Engineers in Steam and close the game upon reaching the main menu.
Step 6: Install dotnet48. DO NOT USE PROTONTRICKS.
WINEPREFIX=${STEAMAPPS_PATH}/compatdata/244850/pfx winetricks --force -q dotnet48
or experimentally
WINE=${HOME}/.steam/steam/compatibilitytools.d/GE-Proton9-25/files/bin/wine64
WINEPREFIX=${STEAMAPPS_PATH}/compatdata/244850/pfx ${HOME}/.steam/steam/compatibilitytools.d/GE-Proton9-25/protonfixes/winetricks --force -q dotnet48
Step 7: Change the compatibility layer in Steam to GE-Proton10-X, where X is the minor version.
Step 8: Launch the game and hope everything worked.












I prefer appimages, it feels much more “open” than flatpak ever will.
Flatpak: install flatpost and flatseal.
Appimage: Download appimaged appimage to ~\Applications and run once.
then
Flatpak: Go to site for cool software I heard of, see it’s flatpak with a link on the page. Click link, wait for flatpost to open, wait for flatpost to update repos, get cool software and possibly another copy of mesa and gnome compat stuff, then head to flatseal to fix drive/device permissions as needed.
Appimage: Go to site for cool software I heard of, see it’s an appimage, download said appimage to ~\Applications, appimaged automatically loads in a desktop entry and we’re done.
As far as updates, all the appimages that are in active development that I use, offer auto-updating when I open them, plus I’m not reliant on a centrally-controlled repo of the packages (which if it dies, takes all updates with it).
I feel appimage would be an easier adoption for people fresh to linux, as it follows the same model as windows or macos (download executable, install app), even for the initial setup of appimaged.
And either way, there’s no “winner” here, if we’re playing that game, native installs still win. Every distro supports (and uses) those by default, except for ubuntu, who has money on pushing snaps.