In order for you to play The Dweller on Linux with minimal graphics settings, your computer must meet the following requirements
Operating System:
Ubuntu 14.04.5 64 bit
Processor (CPU):
1.0 GHz Processor
Memory (RAM):
2 GB RAM
Graphics Card:
nVidia GeForce 6200, ATI/AMD Radeaon HD2400 XT
Storage:
200 MB available space