In order for you to play Total War: WARHAMMER III on Linux with minimal graphics settings, your computer must meet the following requirements
Operating System:
Ubuntu 20.04 LTS
Processor (CPU):
3.4GHz Intel Core i3-4130 or AMD Ryzen CPU equivalent
Memory (RAM):
8 GB RAM
Graphics Card:
NVIDIA GeForce GTX 970 4GB or AMD Radeon RX 470 4GB
Storage:
125 GB available space
In order to play Total War: WARHAMMER III on Linux with maximum graphics settings, you need a computer with a configuration no worse than the following
Operating System:
Ubuntu 20.04 LTS
Processor (CPU):
3.4GHz Intel Core i7-4770 or AMD Ryzen CPU equivalent
Memory (RAM):
8 GB RAM
Graphics Card:
NVIDIA GeForce GTX 1070 8GB or AMD Radeon RX 5700 XT 8GB
Storage:
125 GB available space