[golergka]

> 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.

[krzyk]

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).

[golergka]

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.

[richrichardsson]

> return the investment of releasing a Linux version

It must be nigh on impossible; beyond developer time, support requests will be a complete nightmare.

[krzyk]

So why do many indies do have Linux versions (Steam is a good source for those)?

From what you wrote it should be next to impossible to find them.