Quad- The player must now research the upgrade in the 'upgrade' tab to be able to construct these units.It is commonly used as a scout unit due to its high speed (and rather poor weaponry strong versus infantry) as well as a secondary role as guardian to the player's harvesting operations to fend off enemy troopers. Trike- House Harkonnen and Atreides construct trikes in the early part of the technology tree (Ordos may still purchase them though Starports).Engineer- An unarmed infantry used to capture enemy structures as their own.It can be deployed strategically near enemy harvesters to draw the attention of sandworms to the area to disrupt the enemy's economy.
Emperor Frederick IV Corrino has issued a challenge that the House which can produce the most spice will control its source, the desert planet Dune, with no rules as to how the Houses can achieve the goal.