In order for you to play The Long Dark on Linux with minimal graphics settings, your computer must meet the following requirements
Operating System:
SteamOS or Ubuntu 16.04 or 17.04
Processor (CPU):
Dual-Core Intel i5 CPU @ 2GHz+
Memory (RAM):
4 GB RAM
Graphics Card:
Intel 4xxx Series w/ 512MB VRAM or better
Storage:
7 GB available space
Sound Card:
Any on-board chip will work.