In order for you to play Still Heroes on Linux with minimal graphics settings, your computer must meet the following requirements
Operating System:
Ubuntu 20.04 / Ubuntu 18.04 / CentOS
Processor (CPU):
64-bit CPU Dual Core 1.7GHz or faster
Memory (RAM):
2 GB RAM
Graphics Card:
OpenGL 3.2+, Vulkan capable
Storage:
3 GB available space