This is a free feature-limited demo with no time limit or usage limit. It showcases the Quick Start singleplayer mode and has restricted multiplayer capabilities. To install, simply run the .exe installer and follow the instructions. Version 1.2.2 is a bug fix release. Version 1.2.1 added achievements, the ability to surrender in multiplayer games, widescreen rendering improvements, and the usual plethora of lesser bug fixes and interface improvements.