instructions below

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Original guide by
Ayush Pande xda
(147 Articles Published)

Instructions please visit here first
https://www.xda-developers.com/install-steam-on-raspberry-pi/

My amended instructions How to install Steam on Raspberry Pi

Press Ctrl+Alt+T to launch the Terminal.

sudo dpkg –add-architecture armhf

sudo apt-get update && sudo apt-get upgrade

sudo apt install gcc-arm-linux-gnueabihf -y

sudo apt-get install git -y

sudo apt install cmake -y

git clone https://github.com/ptitSeb/box64

cd box64

mkdir build; cd build; cmake .. -D RPI5ARM64=1 -D CMAKE_BUILD_TYPE=RelWithDebInfo

sudo make install

sudo systemctl restart systemd-binfmt

cd ~

git clone https://github.com/ptitSeb/box86

cd box86

mkdir build; cd build; cmake .. -D RPI4ARM64=1 -D CMAKE_BUILD_TYPE=RelWithDebInfo

sudo make install

sudo systemctl restart systemd-binfmt

sudo apt install libgdm1:armhf libudev1:armhf libgl1-mesa-dri:armhf libglapi-mesa:armhf libglu1-mesa:armhf libglx-mesa0:armhf mesa-va-drivers:armhf mesa-vdpau-drivers:armhf mesa-vulkan-drivers:armhf libsdl1.2debian:armhf libegl-mesa0:armhf

sudo apt-get install libc6:armhf -y

sudo apt install mesa-vulkan-drivers -y

open files open the box86 folder.
right click on install_steam.sh and choose run as a program

Open a terminal type steam to launch

It will likely fail

restart ubuntu
If you get no Desktop
Login with the username and password you created
sudo apt install ubuntu-desktop
login
Open a terminal
steam

My videos

Running Windows games on Raspberry Pi 4. Box86 & Wine First try. Twister OS.
https://youtu.be/yoIptyr6zV4

Wine. Running Windows Programs in Linux. Raspberry Pi 4 Twister OS.
https://youtu.be/6LWaDyhr7GE

Steam running on Orange Pi 5
https://youtu.be/wrrFngxybuE

My playlist

Everything Raspberry Pi. Over 600 Videos
https://www.youtube.com/playlist?list=PLMJAjiTgBtFnaITgDfjTnsL9RlnyPTl7M

Raspberry Pi NEWS
https://www.youtube.com/playlist?list=PLMJAjiTgBtFk4KtZK73Bui1mqC8I80WWW

source