PC/Linux/Steam Noob here. I just got a game from GOG and I’m seeing tutorials mention Heroic, Lutris, and Wine via ProtonUp-QT as methods to get non-Steam games installed and running on Deck. Which method would you consider the easiest and most reliable for content from GOG, Ubisoft, Epic, etc…
Generally I add installers using “add non-steam app”, then once they install successfully, remove it and instead add the executable that was created.
Proton can do it correctly just it’s a PITA navigating the folders to make it work.
Lutris can work but some of it’s scipts are outdated or not made with steamdeck in mind