In order for you to play Total War: WARHAMMER II on Linux with minimal graphics settings, your computer must meet the following requirements
Operating System:
Ubuntu 18.04 64-bit
Processor (CPU):
3.4GHz Intel Core i3-4130
Memory (RAM):
6 GB RAM
Graphics Card:
2GB Nvidia GTX 680 or better, 2GB AMD R9 285 (GCN 3rd Gen) or better
Storage:
60 GB available space
In order to play Total War: WARHAMMER II on Linux with maximum graphics settings, you need a computer with a configuration no worse than the following
Operating System:
Ubuntu 18.04 64-bit
Processor (CPU):
3.4 GHz Intel Core i7-4770
Memory (RAM):
8 GB RAM
Graphics Card:
4GB Nvidia 970, 4GB AMD RX 480
Storage:
60 GB available space