A single-player demo has been released for Dunes of War, the stand-alone expansion (I'm still trying to understand how that works) to the tank-battle simulator, Panzer Elite Action: Fields of Glory. The demo includes one single mission set in Tunesia and can be downloaded from 3D Gamers.

Panzer Elite Action: Dunes of War follows two separate tank crews - one German, the other American - through the North Africa campaign in World War 2. The full version will ship with multiplayer support for up to 32 players in "Capture The Flag" and "Conquest" modes.

With fast-paced action and a third-person perspective, it is arguable that describing this game as a "simluation" may be overly generous.