What are Invisible, Inc minimum system requirements?

Minimum PC Requirements: 
OS: Windows Vista/Windows 7/Windows 8 
Processor: 2.0+ GHz Dual Core or better 
Memory: 2 GB RAM 
Graphics: NVIDIA GeForce 8600 GT / ATI Radeon HD 2600 XT or greater 
DirectX: Version 9.0c 
Hard Drive: 2 GB available space 
Sound Card: 100% DirectX9.0c compatible sound card and drivers
 
Minimum Mac Requirements: 
OS: 10.8.5 (Mountain Lion) 
Processor: 2.0 GHz Intel Core 2 Duo (Dual-Core) 
Memory: 4 GB RAM 
Graphics: NVIDIA 610M or higher, or Radeon 8400 or higher, or Intel HD 4000 or higher
Hard Drive: 2 GB available space

Minimum Linux/Steam OS Requirements: 
OS: Linux Ubuntu 14 (or higher)
Processor: 2.0+ GHz Dual Core or better 
Memory: 2 GB RAM 
Graphics: NVIDIA 610M or higher, or Radeon 8400 or higher, or Intel HD 4000 or higher 
DirectX: Version 9.0c 
Hard Drive: 2 GB available space