Use this time to see if you like the game, and to check whether it is compatible with your computer. The demo contents is 100% the same as the CD version of the game, and the download is free, but it is limited to 1 hour of game play. Convert to full version for €9.95 / $12.95 with no additional downloads.Play full-featured game immediately after download, no wait for a CD to arrive.Internet connection needed to activate, but not needed to play.Better than a feature-limited demo it's the full game.