Steam is a popular game distribution platform by Valve.
Steam requires glibc to run, and thus doesn't straight up run on Alpine Linux. To work around this problem, we'll use Flatpak. Make sure you have the Flathub repository installed.
# apk add flatpak $ flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo $ flatpak install com.valvesoftware.Steam
After installation Steam can be started using it's .desktop file or on the command line:
$ flatpak run com.valvesoftware.Steam
My controllers aren't detected
By default Steam doesn't have permission to read your controllers. This can be fixed by installing an udev rule from the official Steam package, but the udev rules are also available as an Alpine package.
# apk add steam-devices
SteamVR won't launch
Out of the box SteamVR might not be able to launch and give you various errors. Steam tries to fix this itself by setting the right capabilities on the SteamVR binary, but this doesn't work in the Flatpak. Instead we'll have do it manually.
# setcap CAP_SYS_NICE+ep ~/.var/app/com.valvesoftware.Steam/data/Steam/steamapps/common/SteamVR/bin/linux64/vrcompositor-launcher
Then restart Steam.
There is an issue for this on the Flathub repository.