In order to play Monochroma on Windows with maximum graphics settings, you need a computer with a configuration no worse than the following
Operating System:
XP or later
Processor (CPU):
Core 2 Duo 2GHz or better
Memory (RAM):
4 GB RAM
Graphics Card:
512 MB Video Card or better
DirectX:
Version 9.0
Storage:
5 GB available space
Sound Card:
Direct X 9 Competible