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System Requirements

Windows
macOS
    Minimum: 1.2GHz Intel Pentium 4 or AMD Athlon processor or equivalent, 256MB RAM, 64 MB Video Card w/Hardware T&L (GeForce 2/Radeon 7500 or better), DirectX 9.0c compatible sound card, 1.7 GB of free hard drive space, Direct X 9.0c (included)
    Recommended: 1.8GHz Intel Pentium 4 or AMD Athlon processor or equivalent/better, 512 MB RAM, 128 MB Video Card w/ DirectX 8 support (pixel and vertex shaders), DirectX 9.0c compatible sound card, 1.7GB of free hard drive space, DirectX 9.0c (included)
    SUPPORTED OPERATING SYSTEMS:
    Windows 2000 (plus Service Pack 1 or higher), Windows XP (Home or Professional) (plus Service Pack 1 or higher)
    *Requires Sid Meier's Civilization IV to play
* Starting January 1st, 2024, the Steam Client will only support Windows 10 and later versions.
    Recommended:
    • OS: Mac OS X 10.4, 10.5, and 10.6
    • Processor: PowerPC G5 or Intel
    • CPU Speed: 2.0 GHz
    • Memory: 1GB or higher
    • Hard Disk Space: 3.5 GB free disk space
    • Video Card: (ATI): Radeon 9600 Video Card (NVidia): GeForce FX 5200
    • Video Memory: (VRam): 128 MB
    • Multiplayer: Internet (TCP/IP) and LAN (TCP/IP) play supported. Internet play requires broadband connection.
    • Media Required: CD Drive
    • NOTICE: Apple original CPU’s only, CPU upgrades not supported.
    • NOTICE: Intel integrated video chipsets (GMA 950) are not supported. Supported Video cards: NVIDIA GeForce 5200, 6600, 6800, 7300, 7800 ATI Radeon 9600, 9650, 9700, 9800, X600, X800, X1600, X1900
    • REQUIRED: FULL VERSION OF Civilization IV for Mac OS X TO PLAY
* Starting February 15, 2024, the Steam Client will no longer support 32-bit games or macOS 10.14 or lower.