What fonts are used in the game? The tooltips of artifacts and enemies only show as empty boxes.
That is Unity's default font Arial. Sorry it's not showing up! That's strange.
No, it's not strange at all. I installed ttf-ms-fonts in my Linux system and now it works.
I don't remember why I didn't try that in the first place. At least anyone with the same problem will have the solution now.
Thanks for your reply.