Aspyr Media today announced that Sid Meier's Civilization IV is available for preorder. The game features multiplayer support over LAN, the internet, and "Play-By-Email" for competing or cooperating with live players. A 3D world brings dozens of fully animated units and customizable armies, as well as cities and wonders. Key features of Civilization IV include fast-paced game play for a more streamlined experience, greater accessibility via an easy-to-use interface, a flexible tech tree allowing players more strategic choices for developing civilizations through unique paths, and more. Designed from the ground up for modability, the game includes a powerful map editor with XML and Python support. Civilization IV is slated for shipment in June for $50 (system requirements were unavailable).