Doorways: The Underworld Steam CD Key

Windows

OS: Windows XP, Windows Vista, Windows 7, Windows 8
Processor: Dual core CPU @ 2GHz (Pentium D or better)
Memory: 2 GB RAM
Graphics: NVIDIA 6800, ATI 1950
DirectX: Version 9.0
Storage: 2 GB available space
Sound Card: 100% DirectX 9.0c compatible Audio Device
Additional Notes: Keyboard and mouse or Gamepad

Mac

Processor: 2.9GHz Intel Core i7
Memory: 2 GB RAM
Graphics: Intel HD Graphics 4000 512mb
Storage: 2 GB available space
Additional Notes: Keyboard and mouse or Gamepad

Linux

OS: Ubuntu 12.04
Processor: Intel Core i5-2310 CPU @ 2.90GHz
Memory: 2 GB RAM
Graphics: NVIDIA GeForce GT 440
Storage: 2 GB available space
Sound Card: 100% DirectX 9.0c compatible Audio Device
Additional Notes: Keyboard and mouse or Gamepad