The Deluxe Edition: Included in the Deluxe Edition are 5 In-game historical monuments from around the world, the games original soundtrack as well as a digital art book.Five in-game items include: Statue of Liberty Eiffel Tower Brandenburg Gate Arc de Triomphe Grand central terminalOriginal Soundtrack: This Original Soundtrack includes 14 unique tracks mixed from the ambient music of the game, allowing you to enjoy the wonderful music whenever you want.Digital Art book: See the concepts behind the buildings! The book features almost a 32 hand drawn concepts of the game various buildings and the story behind each. Steam account required for game activation and installation This content requires the base game Cities: Skylines on Steam in order to play PC System Requirements: MINIMUM: OS: Microsoft Windows XP/Vista/7/8 Processor: 2 GHz Dual core Memory: 3 GB RAM Graphics: nVIDIA GeForce 8800, 512 MB RAM or ATI Radeon HD 3850, 512 MB RAM DirectX: Version 9.0 Network: Broadband Internet connection Hard Drive: 2 GB available space RECOMMENDED: OS: Microsoft Windows 7/8 (64-bit) Processor: 3 GHz Quad core Memory: 4 GB RAM Graphics: nVIDIA GeForce GTX460, 1 GB RAM or AMD Radeon HD 6850, 1 GB RAM DirectX: Version 9.0 Network: Broadband Internet connection Hard Drive: 2 GB available space Mac System Requirements: MINIMUM: OS: OSX Snow Leopard 10.6.3 Processor: 2 GHz Dual core Memory: 3 GB RAM Graphics: nVIDIA GeForce 8800, 512 MB RAM or ATI Radeon HD 3850, 512 MB RAM Network: Broadband Internet connection Hard Drive: 2 GB available space RECOMMENDED: OS: OSX Snow Leopard 10.6.3 or later Processor: 3 GHz Quad core Memory: 4 GB RAM Graphics: nVIDIA GeForce GTX460, 1 GB RAM or AMD Radeon HD 6850, 1 GB RAM Network: Broadband Internet connection Hard Drive: 2 GB available space Linux System Requirements: MINIMUM: OS: Ubuntu 12.04 LTS Processor: 2 GHz Dual core Memory: 3 GB RAM Graphics: nVIDIA GeForce 8800, 512 MB RAM or ATI Radeon HD 3850, 512 MB RAM Network: Broadband Internet connection Hard Drive: 2 GB available space RECOMMENDED: OS: Ubuntu 12.04 LTS Processor: 3 GHz Quad core Memory: 4 GB RAM Graphics: nVIDIA GeForce 8800, 512 MB RAM or ATI Radeon HD 3850, 512 MB RAM Network: Broadband Internet connection Hard Drive: 2 GB available space