Minimum

OS: OS 64-bit Windows 7
Processor: Intel CPU Core i5-2500K 3.3GHz / AMD CPU Phenom II X4 940
Memory: 8 GB RAM
Graphics: NVIDIA GeForce GTX 660 / Radeon HD 7870
DirectX: Version 11
Storage: 50 GB available space

Recommended

OS: OS 64-bit Windows 7 / 64-bit Windows 8 (8.1) or Windows 10
Processor: Intel CPU Core i7 4790 4 GHz
Memory: 16 GB RAM
Graphics: NVIDIA GPU GeForce GTX 1070 / AMD GPU Radeon RX Vega 56 8GB
DirectX: Version 11
Storage: 60 GB available space

Note: The Legacy Pack requires an extra 45 GB of space if you own & download it.