The teams at developer 4A Games and publisher Deep Silver are releasing the system requirements for the upcoming Metro: Last Light, in minimum, recommended and optimum flavors.
The list taken from the official GeForce site reads:
Minimum requirements
Windows XP or Vista or Windows 7 or Windows 8 2.2 GHz Dual Core, minimum Intel Core 2 Duo 2GB of RAM DirectX 9, Shader Model 3 compliant video card, minimum Nvidia GTS 250 or AMD HD Radeon 4000 series Direct X 9.0c
3D Vision Support also requires NVIDIA GTX 275 or higher, 120Hz monitor and the Nvidia 3D Vision kit for Windows Vista, 7 or 8
Recommended requirements
Vista or Windows 7 or Windows 8 2.6 GHz Quad Core, minimum Intel Core i5 4GB of RAM Nvidia GTX 580/660 Ti or AMD HD 7870 or higher Direct X 11
For 3D Vision Support gamers also need GTX 580/660Ti or higher, 120Hz monitor and Nvidia 3D Vision kit for Windows Vista, 7 or 8
Optimum requirements
Vista or Windows 7 or Windows 8 3.4 GHz Multi-Core, minimum Intel Core i7 8GB of RAM Direct X 11 Nvidia GTX 690 or NVIDIA Titan
3D Vision also needs Nvidia GTX 690, 120Hz monitor or Nvidia 3D Vision kit for Windows Vista, 7 or 8
Metro: Last Light will be available on May 14 in the United States and three days later in Europe.