In order for you to play Penumbra Overture on Linux with minimal graphics settings, your computer must meet the following requirements
Minimum:
Operating System:
Linux Ubuntu 12.04 or newer, 32-bit libraries must be installed
Processor (CPU):
2.0Ghz
Memory (RAM):
1024MB
Graphics Card:
Radeon 9600/GeForce 4 (GeForce4MX not supported, Integrated graphics might not work.)
Hard Drive:
2.0GB