Please note, it is possible for Mac and PC to become out of sync during updates. Civilization V is also part of SteamPlay, so if a customer purchases the PC version, he will also be able to download the Mac version. These versions, including the Game Of The Year versions (see below) are available for PC and Mac. Video Memory (VRam): 256MB Multiplayer: Internet (TCP/IP) and LAN (TCP/IP) play supported. The special edition came with a CD for the game, a real artbook, two soundtrack CDs and five tin figures. Processor: Intel Core 2 Duo (Dual-Core) CPU Speed: 2.4 GHz INTERNATIONAL TRADE: Build your cities into hubs of international trade by land and sea, creating great wealth and prosperity for your people.ESPIONAGE: Send your spies into foreign cities for surveillance, to steal advanced technologies from your competitors, or to interfere with city-state alliances.RELIGION: Cultivate Great Prophets and create a religion you can customize and enhance.A great game, it becomes all the more irritating when you have Civilization V freeze in the middle. City-states present a diplomatic battleground on which the major powers of the world will vie for supremacy. Every large computer game has some glitches, errors and freezing. DIPLOMACY: Negotiate with some of history’s most cunning rulers, each with a well-crafted plan for victory.Ranged bombardment challenges you to develop clever strategies to guarantee victory on the battlefield. HUGE BATTLES: Wars between empires spread across land and sea.ENDLESS REPLAYABILITY: Play as one of 43 historical leaders and wage war by land, sea, and air, conduct diplomacy & espionage, establish religious beliefs, and discover new technologies in your quest to build the most powerful empire the world has ever known.