The developer of Ultra Off-Road Simulator 2019: Alaska [Steam], a surprisingly good looking off-road driving sim may gain Linux support with enough requests.
In response to a user asking about it on Steam, the developer said this:
Actually - no problem with that. We are making a Mac version anyway, which both with Linux are - UNIX operating systems. So making a Linux port is rather simple. If enough Linux user will come around and request Linux version - you'll get Linux version :D
While I think they're underestimating the differences nowadays, it's good to know they're open to supporting Linux.
About the game:
'Ultra Off-Road Simulator 2019: Alaska' is a realistic simulator of a real-life off-road experience and first installment of an upcoming series. Drive through one of the most extreme environments in the world - the wild and cold Alaska.
No rules, no barriers, no ‘safe-zones’. Only you, your car and the map - against the odds of the wild and uncharted Alaska. The final challenge and ultimate test. Man versus Nature, in all it’s glory and unrelenting force.
It features a vast open world with deformable terrain, a day and night cycle which could make things interesting when paired with dynamic weather too. A claim of "realistic" physics and destructible cars. I actually think it looks rather nice, could be quite a relaxing experience and I can't really think of many others like it on Linux.
If it sounds like your thing, do let the developer know in the Steam post.