Minimum:

OS: Windows® 7, 64-bit
Processor: Intel Core 2 Duo E4700 2.6 GHz or AMD Phenom 9950 Quad Core 2.6 GHz
Memory: 4 GB RAM
Graphics: 1GB ATI Radeon HD 5770, 1GB NVIDIA GeForce GTX 460 or better
DirectX: Version 11
Storage: 45 GB available space
Sound Card: DirectX compatible sound card
Additional Notes: Initial installation requires one-time Internet connection for Steam authentication; software installations required (included with the game) include Steam Client, Microsoft Visual C++2012 and 2013 Runtime Libraries and Microsoft DirectX.

XCOM 2 screenshots