Packages compatible with Debian are available on the openSUSE Build Service.
You can add a repository to receive automatic updates:
echo "deb http://download.opensuse.org/reposit...re/Debian_9.0/ ./" | sudo tee /etc/apt/sources.list.d/lutris.list
wget -q https://download.opensuse.org/reposi....0/Release.key -O- | sudo apt-key add -
sudo apt-get update
sudo apt-get install lutris
sorce
https://lutris.net/downloads/