Heroic Fantasy Games has released a playable demo of Battle of the Sands which contains a small tutorial campaign comprising three missions. It also contains three challenging stand-alone missions that you can play or allow the computer to play while you watch.
In Battle of the Sands, fossil fuels have been completely exhausted on Earth. Yet they remain essential for numerous human activities. Fortunately, vast resource deposits have been discovered on a desert planet in a colonised system. Six mega corporations are vying for control of these resources. As Director of Production of one of the six companies, it is your duty to repel the enemy factions and ascertain your monopoly.