Heroic has the option to automatically add games to steam. Also it works quite well in game mode if you add it as a non steam game and can then be controlled entirely with a controller. That’s the most convenient option I found.

I mean I get the idea, but if it ain’t open source I’ll just go with the ever so slightly more difficult option of downloading Heroic and adding it as a non steam game.

As far as I know this a display bug, discover sometimes swaps the numbers of the new and previous version. You should be fine updating them

Goat Simulator (or 3)

Superflight

Defunct

Don’t remember where this is from but I know it immediately caught my eye