Lutris is an open source gaming platform for GNU/Linux. It makes gaming on Linux easier by taking care of managing, installing and providing optimal settings for games.
The Lutris.net website offers installers for all kind of games, provided by the community. Open source and free games can be installed in a single step and commercial games can be installed as long as you provide the necessary files. Lutris does not sell or provide commercial games but can work with games acquired from major online game stores such as Steam, GOG, Humble Bundle or Itch.