In order for you to play Sigma Theory: Global Cold War on Linux with minimal graphics settings, your computer must meet the following requirements
Operating System:
Ubuntu 12.04+
Processor (CPU):
1,3 GHz CPU
Memory (RAM):
2 GB RAM
Storage:
1 GB available space
Recommended System Requirements (Linux)
In order to play Sigma Theory: Global Cold War on Linux with maximum graphics settings, you need a computer with a configuration no worse than the following