In order for you to play BOOK OF HOURS on Linux with minimal graphics settings, your computer must meet the following requirements
Operating System:
Ubuntu 20.04, Ubuntu 18.04, and CentOS 7 (these are the standard Unity Player requirements; other distros may work; we test on Mint Cinnamon)
Processor (CPU):
2GHz or better, x64 architecture with SSE2 instruction set support.
Memory (RAM):
1 GB RAM
Graphics Card:
4GB VRAM, 1600x1024 minimum resolution, OpenGL 3.2+, post-2012 integrated graphics
Storage:
5 GB available space