In order for you to play HOARD on Linux with minimal graphics settings, your computer must meet the following requirements
Operating System:
Any linux distribution in since 2010
Processor (CPU):
Dual Core 2Ghz
Memory (RAM):
2GB
Hard Disk Space:
625 MB
Video Card:
ATI Radeon X800 XL or better
Sound:
Supports OpenAL 1.1 or better
Additional:
Requires OpenGL 2.1+ (S3TC Support required). XBox 360 controller recommended.
Multiplayer:
Online multiplayer requires Internet Connection.