In order to play Iratus: Lord of the Dead on Linux with maximum graphics settings, you need a computer with a configuration no worse than the following
Operating System:
Ubuntu 18.04 LTS 64 bit
Processor (CPU):
Intel Core i5 3.0 GHz
Memory (RAM):
4 GB RAM
Graphics Card:
NVIDIA GeForce GTX 760, AMD Radeon R9 280X
Storage:
3500 MB available space
Sound Card:
Direct X9 Compatible