Steam account is required for game activation and installation 

PC System Requirements
MINIMUM:
Requires a 64-bit processor and operating system
OS: WINDOWS® 7, 8.1, 10 (64-BIT Required)
Processor: Intel® Core™ i5-4460 or AMD FX™-6300 or better
Memory: 8 GB RAM
Graphics: NVIDIA® GeForce® GTX 760 or AMD Radeon™ R7 260x with 2GB Video RAM
DirectX: Version 11
Storage: 26 GB available space
Additional Notes: This game is expected to run at 1080p/30 FPS. If you have don't have enough graphics memory to run the game at your selected texture quality, you must go to Options > Graphics and lower the texture quality or shadow quality, or decrease the resolution. An internet connection is required for product activation. (Network connectivity uses Steam® developed by Valve® Corporation.)

RECOMMENDED:
Requires a 64-bit processor and operating system
OS: WINDOWS® 7, 8.1, 10 (64-BIT Required)
Processor: Intel® Core™ i7-3770 or AMD FX™-9590 or better
Memory: 8 GB RAM
Graphics: NVIDIA® GeForce® GTX 1060 or AMD Radeon™ RX 480 with 3GB VRAM
DirectX: Version 11
Storage: 26 GB available space
Additional Notes: This game is expected to run at 1080p/60 FPS. An internet connection is required for product activation. (Network connectivity uses Steam® developed by Valve® Corporation.)