Windows:

• OS *: Microsoft Windows Vista (SP2) with DirectX 11 update (KB971512-x64), Windows® 7 (Service Pack 1) and Windows 8.1® - (64-bit only) / Windows® 10/ (64-bit only)
• Processor: 2.6 GHz Intel® Core™ i5-750 or 3.2 GHz AMD Phenom™ II X4 955
• Memory: 4 GB RAM
• Graphics: NVIDIA GeForce GTX 460 or AMD Radeon HD5850 (1 GB VRAM)
• DirectX: Version 11
• Storage: 4 GB available space
• Sound Card: Integrated or dedicated DirectX 11 compatible soundcard

* Starting January 1st, 2024, the Steam Client will only support Windows 10 and later versions.

SteamOS+Linux:

• OS: Ubuntu Equivalent Distro
• Processor: 2.6 GHz Intel® Core™ i5-750 or 3.2 GHz AMD Phenom™ II X4 955
• Memory: 4 GB RAM
• Graphics: OpenGL 3 Compatible GPU with 1GB Video RAM
• Storage: 4 GB available space
• Additional Notes: IS Defense will launch only on "64-bit" version of operating system.

Windows:

• OS *: Windows® 7 (Service Pack 1) / Windows® 8 / Windows® 8.1 / Windows® 10/ (64-bit only)
• Processor: AMD Octa-Core / Intel Quad-Core processor running at 3.4 GHz (AMD FX X8 8350 or Intel Core i5 3570 or newer architectures are recommended)
• Memory: 8 GB RAM
• Graphics: AMD/NVIDIA dedicated with at least 2048MB of dedicated VRAM and with at least DirectX 11 and Shader Model 5.0 support. AMD Radeon R9 285 and NVIDIA GeForce GTX 670 and above are recommended graphic cards.
• DirectX: Version 11
• Storage: 4 GB available space
• Sound Card: Integrated or dedicated DirectX 11 compatible soundcard

* Starting January 1st, 2024, the Steam Client will only support Windows 10 and later versions.

SteamOS+Linux:

• OS: Ubuntu Equivalent Distro
• Processor: AMD Octa-Core / Intel Quad-Core processor running at 3.4 GHz (AMD FX X8 8350 or Intel Core i5 3570 or newer architectures are recommended)
• Memory: 8 GB RAM
• Graphics: OpenGL 3 Compatible GPU with 1GB Video RAM
• Storage: 4 GB available space
• Additional Notes: IS Defense will launch only on "64-bit" version of operating system.