In order for you to play Merchant of the Skies on Linux with minimal graphics settings, your computer must meet the following requirements
Operating System:
Ubuntu 16.04+ / SteamOS
Processor (CPU):
SSE2 instruction set support
Memory (RAM):
1024 MB RAM
Graphics Card:
shader 3.0 supporting card (i.e. Intel HD Graphics 4000)
Storage:
512 MB available space