It's chess, but you replace your entire army with a royal shotgun, with some roguelike elements.
System requirements
Windows
Minimum:
OS: Windows 7
Processor: yes, you should have one
Graphics: you'll need a screen
Storage: 80 MB available space
Sound Card: if your computer can play sound, you should be good
Additional Notes: in theory, if your computer can run Windows, it can run Shotgun King