The Indus River valley was home to the early Harappan civilization while the Yellow River valley in China saw the rise of the earliest Chinese dynasties. Both these regions are included on the same map. The Cradle of Civilization map packs are Firaxis-designed maps of real-world locations. You can play random leaders in these settings, or choose leaders appropriate to the history of these areas. The maps can also be opened up in World Builder, where you can even create specific scenarios. SteamOS + Linux: OS: SteamOS, Ubuntu Processor: Intel Core i3, AMD A10 2.4GHz Memory: 4 GB RAM Hard Disk Space: 10 GB Video Card: (ATI) Radeon HD 6450, (NVIDIA) Geforce 640M, (INTEL) Iris Pro Video Memory: 1GB Notice: Intel Integrated video chipsets (GMA 9XX, HD 3XXX) will not run Civilization V for SteamOS and Linux, and are unsupported. Notice: The Mac and Linux + SteamOS versions of Sid Meier's Civilization V are available in English, French, Italian, German and Spanish only.