XCOM: Enemy Unknown PC Brand: 2K Games ESRB Rating: M - Mature Genre: Strategy System Requirements: Minimum System Requirements: OS: Windows Vista Processor: 2GHz Dual Core Memory: 2 GB Hard Drive: 20 GB Free Graphics: NVIDIA GeForce 8600 GT / ATI Radeon HD 2600 XT or greater Sound: DirectX compatible Other Requirements: Broadband Internet connection Additional: Initial installation requires one-time internet connection for Steam authentication; software installations required (included with the game) include Steam Client, Visual C++ 2008 Redistributable, DirectX and Microsoft .NET 4. Recommended System Requirements: OS: Windows 7 Processor: 2GHz Dual Core (Intel Core 2 Duo 2.4 GHz or Athlon X2 2.7 GHz) Memory: 4 GB Hard Drive: 20 GB Free Graphics: NVIDIA GeForce 9000 Series / ATI Radeon HD 3000 Series or greater Sound: DirectX compatible Ot...