Here are the Sniper Elite: Nazi Zombie Army 2 System Requirements (Minimum)
CPU: Dual-core CPU with SSE3 (Intel Pentium D 3GHz / AMD Athlon 64 X2 4200) or better
CPU SPEED: Info
RAM: 2 GB
VIDEO CARD: Microsoft DirectX 10.0 compatible graphics card with 256 MB of memory (NVIDIA GeForce 8800 series / ATI Radeon HD 3870) or better
DEDICATED VIDEO RAM: 256 MB
PIXEL SHADER: 4.0
VERTEX SHADER: 4.0
OS: Microsoft Windows Vista (Service Pack 2) or Windows 7 or Windows 8 (Windows XP is NOT supported)
FREE DISK SPACE: 6 GB
SOUND CARD: Yes

Sniper Elite: Nazi Zombie Army 2 Recommended Requirements
CPU: Intel Core i5 / AMD FX series or better
CPU SPEED: Info
RAM: 6 GB
VIDEO CARD: Microsoft DirectX 11.0 compatible graphics card with 1GB of memory (NVIDIA GeForce 460 series / ATI Radeon HD 7750) or better
DEDICATED VIDEO RAM: 1 GB
PIXEL SHADER: 5.0
VERTEX SHADER: 5.0
OS: Microsoft Windows Vista (Service Pack 2) or Windows 7 or Windows 8 (Windows XP is NOT supported)
FREE DISK SPACE: 6 GB
SOUND CARD: Yes