System Requirements:

Windows
OS: Windows Vista
Processor: 2.0 GHz
Memory: 512 MB RAM
Graphics: GeForce 8800 or Radeon® HD4800 series, 512 MB of memory
Hard Drive: 300 MB available space
Mac
OS: Mac OS X 10.9 - Mavericks
Processor: 2.0 GHz
Memory: 512 MB RAM
Hard Drive: 300 MB available space
Linux
OS: Ubuntu 10.10
Processor: 2.0 GHz
Memory: 300 MB RAM
Graphics: GeForce 8800 or Radeon® HD4800 series, 512 MB of memory
Hard Drive: 300 MB available space

System Requirements:

Windows
OS: Windows XP
Processor: 1.66 Ghz
Memory: 1 GB RAM
Graphics: DirectX compatible card
Storage: 500 MB available space
Mac
OS: OS X version Leopard 10.5.8 or later
Processor: 1.66 Ghz
Memory: 500 MB RAM
Storage: 1 GB available space
Linux
OS: Ubuntu 12.04
Processor: 1.66 Ghz
Memory: 500 MB RAM
Storage: 1 GB available space

System Requirements:

Windows
OS: Microsoft Windows 7/8.1/10 (64-bit versions)
Processor: Intel Core i5-2400, AMD FX-8320
Memory: 4 GB RAM
Graphics: GeForce GTX 660 2GB, AMD Radeon 7850 2GB
DirectX: Version 11
Network: Broadband Internet connection
Storage: 10 GB available space

System Requirements:

Windows
OS: Windows XP SP 2/ Vista / 7 / 8 / 10
Processor: Intel/AMD Dual Core 1.5 GHz
Memory: 1 GB RAM
Graphics: with Shader 2.0 support and 128 MB RAM (Geforce FX 7+, ATI Radeon X2-series)
DirectX:9.0c 
Hard Drive: 4 GB free hard disc space
Sound: DirectX 9.0c compatible
Misc: Keyboard, Mouse

System Requirements:

Windows
OS: Windows XP / Vista / 7 / 8
Processor: Dual Core CPU 2.0 GHz 
Memory: 1 GB 
Graphics: GeForce FX 6, 7 and 8 series, AMD/ATI Radeon X-series with Shader 2.0b support
Hard Drive: 6 GB Free Space
Sound: DirectX 9.0c compatible
Misc: Keyboard, Mouse, Broadband Internet Connection

System Requirements:

Windows
OS: Windows XP SP3, Windows Vista, Windows 7
Processor: Intel or AMD Single-Core Prozessor (2,0 GHz) or better
Memory: 2 GB or more
Graphics: Radeon HD, Geforce 8800GT (Shader 3.0 and 512 MB RAM)
DirectX®: DirectX 9.0c or OpenGL
Hard Drive: 8 GB
Sound: DirectX comp. Stereo Sound Card
Other: Internet connection with 6.000 BPS or more for Multiplayer recommended

System Requirements:

Windows
OS: Any Windows Version with MP3 Player
Processor: any
Memory: 1 GB RAM
Graphics: any
Storage: 600 MB available space
Sound Card: any
Mac
OS: Any OSX with MP3 Player
Processor: any
Memory: 1 GB RAM
Graphics: any
Storage: 1 GB available space
Sound Card: any
Linux
OS: Any OSX with MP3 Player
Processor: any
Memory: 1 GB RAM
Graphics: any
Storage: 1 GB available space
Sound Card: any

System Requirements:

Windows
OS: Windows Vista/7/8
Mac
OS: Lion (10.7)

System Requirements:

Windows
OS: Windows XP
Memory: 2 GB RAM
Graphics: Open GL 3.2+ Compliant
Storage: 2 GB available space
Additional Notes: 1080p, 16:9 recommended
Mac
OS: OSX 10.9+
Memory: 2 GB RAM
Graphics: Open GL 3.2+ Compliant
Storage: 2 GB available space
Linux
OS: Ubuntu 12.04
Memory: 2 GB RAM
Graphics: Open GL 3.2+ Compliant
Storage: 2 GB available space
Additional Notes: 1080p, 16:9 recommended

System Requirements:

Windows
OS: Windows XP SP2+
Processor: SSE2 instruction set support
Memory: 2 GB RAM
Graphics: Graphics supporting DX9 or DX11 with 9.3 capabilities
DirectX: Version 9.0
Storage: 1 GB available space
Mac
OS: Mac OSX 10.8+
Processor: SSE2 instruction set support
Memory: 2 GB RAM
Graphics: Graphics supporting DX9 or DX11 with 9.3 capabilities
Storage: 1 GB available space
Linux
OS: Ubuntu 12.04+ / Steam OS+
Processor: SSE2 instruction set support
Memory: 2 GB RAM
Graphics: Graphics supporting DX9 or DX11 with 9.3 capabilities
Storage: 1 GB available space

System Requirements:

Windows
OS: Windows XP
Memory: 1 GB RAM
Network: Broadband Internet connection
Storage: 100 MB available space

System Requirements:

Windows
OS: Windows 7/8/10
Processor: Intel Core i5-750 or equivalent
Memory: 4 GB RAM
Graphics: Nvidia GTS 450 or equivalent
Storage: 15 GB available space

System Requirements:

Windows
Minimum:

Requires a 64-bit processor and operating system OS: Windows 7 64 Bit Processor: You are probably fine here :-) Graphics: Just close your eyes… Storage: 800 MB available space Sound Card: Creative SOUNDBLASTER
Linux
Minimum:

Requires a 64-bit processor and operating system

Recommended:

Requires a 64-bit processor and operating system
Mac
Minimum:

Requires a 64-bit processor and operating system

Recommended:

Requires a 64-bit processor and operating system

System Requirements:

Windows
Minimum:

OS: Windows 10, Windows 8, Windows 7, Vista, or XP Service Pack 3 Storage: 60 MB available space Sound Card: Yes
Mac
Minimum:

Storage: 60 MB available space

System Requirements:

Windows
Storage: 385 MB available space Storage (high-quality audio): Additional 1285 MB available space

System Requirements:

Windows
Minimum:

OS: Microsoft® Windows Server 2008, Windows 7, or Windows 8 Classic Processor: 2.33GHz or faster x86-compatible processor, or Intel Atom™ 1.6GHz or faster processor for netbook class devices Memory: 500 MB RAM Storage: 50 MB available space

System Requirements:

Windows
Minimum:

OS: Any Processor: Any
Linux
Minimum:

OS: Any Processor: Any
Mac
Minimum:

OS: Any Processor: Any

System Requirements:

Windows
OS: Windows 7 or later Processor: 2GHz or better Memory: 1 GB RAM Graphics: 1280x768 minimum resolution, post-2012 graphics hardware DirectX: Version 9.0c Storage: 500 MB available space Sound Card: DirectX 9.0c compatible

System Requirements:

Windows
Minimum:

OS: - Processor: - Graphics: - Storage: 100 MB available space Sound Card: - Additional Notes: -