In order for you to play Master of Orion on Linux with minimal graphics settings, your computer must meet the following requirements
Operating System:
Ubuntu 14.04 64-bit or newer, SteamOS
Processor (CPU):
Intel Core 2 Duo 2.0 GHz or AMD Athlon X2 2.2 GHz
Memory (RAM):
2 GB RAM
Graphics Card:
NVidia 240, ATI 4650, Intel HD 4000 or better
Storage:
15 GB available space
In order to play Master of Orion on Linux with maximum graphics settings, you need a computer with a configuration no worse than the following
Operating System:
Ubuntu 14.04 64-bit or newer, SteamOS
Processor (CPU):
Intel i5 2.8GHz or AMD Athlon X4 3.0GHz
Memory (RAM):
4 GB RAM
Graphics Card:
NVidia 560, ATI 5870 or better
Storage:
15 GB available space