> The game uses Unity3D, it might only be a matter of ... recompilation :D
It's not. It's a matter of porting, QAing, and then indefinitely supporting a platform that will not bring enough revenue even to cover the developer's time.
For AAA titles I could understand that, but for indies?
They won't sell that much Windows copies, so having a Linux option is always good (see other indies, like Factorio, Oxygen not included, Hollow Knight).
It's especially true for indies: if you don't sell as much Windows copies, you won't sell as much Linux copies too, proportionally. I've worked in an indie publisher, and not a single one of our projects would return the investment of releasing a Linux version.
I spend my entire day in tmux and vim land in a Linux terminal, but as a gamer wanting to play good games, it’s windows all the way. Gaming on Linux just still isn’t there yet.
If you have a GPU that supports Vulkan these days, and you play games on Steam, it is very likely that you will be able to play games even without native Linux support. I check before I purchase any games, but it has become very unusual when I encounter a Steam game that I cannot play.
And testers running the whole thing on a new platform at the very least. I'd like to see it on Linux as well, but let's not underestimate the time required.
It's not. It's a matter of porting, QAing, and then indefinitely supporting a platform that will not bring enough revenue even to cover the developer's time.