In order for you to play A Castle Full of Cats on Linux with minimal graphics settings, your computer must meet the following requirements
Operating System:
Any OS with x11 support
Processor (CPU):
Requires a 64-bit processor and operating system
Memory (RAM):
4 GB RAM
Graphics Card:
Any with OpenGL 3.3 Support or better, Intel HD Graphics 4000 or better
Storage:
300 MB available space
Sound Card:
DirectSound-compatible sound card
In order to play A Castle Full of Cats on Linux with maximum graphics settings, you need a computer with a configuration no worse than the following
Operating System:
Any OS with x11 support
Processor (CPU):
Requires a 64-bit processor and operating system
Memory (RAM):
8 GB RAM
Graphics Card:
GTX 1050 or equivalent
Storage:
300 MB available space
Sound Card:
DirectSound-compatible sound card