Like all minimum reqs they are a bit arbitrary and as a solo dev I can't test the game at a wide range of machines. I know some people with built in intel GPU's had trouble running it. The ones I have listed on steam are pasted below. But it think the game can run on much less.
SYSTEM REQUIREMENTS
- MINIMUM:
- Requires a 64-bit processor and operating system
- OS: Windows 7
- Processor: 2 core cpu
- Memory: 8 GB RAM
- Graphics: Nvidia 1050/AMD 560
- Storage: 15 GB available space
- RECOMMENDED:
- Requires a 64-bit processor and operating system
- OS: Windows 10
- Processor: 4 core cpu
- Memory: 16 GB RAM
- Graphics: Nvidia 1080/AMD V64
- Storage: 15 GB available space