In order for you to play Fort Triumph on Linux with minimal graphics settings, your computer must meet the following requirements
Operating System:
Ubuntu 16.04+, SteamOS+ (64bit)
Processor (CPU):
Intel I3 4160 processor or equivalent
Memory (RAM):
8 GB RAM
Graphics Card:
NVIDIA GeForce GT 630 or Equivalent
Storage:
3 GB available space
In order to play Fort Triumph on Linux with maximum graphics settings, you need a computer with a configuration no worse than the following
Operating System:
Ubuntu 18.04+, SteamOS+ (64bit)
Processor (CPU):
Intel i7 4770 processor or equivalent
Memory (RAM):
8 GB RAM
Graphics Card:
NVIDIA GeForce GTX 660 / Radeon HD 7850 or better
Storage:
3 GB available space