Dune II: The Building of a Dynasty/Units

House Harkonnen relies on heavy and powerful, but expensive units, while House Atreides is a more "middle of the road" side with access to good specialised units such as the Sonic Tank. House Ordos tends to prioritise speed over strength and have a mix of technology from both houses like the ornithopter and heavy troopers, and have other quite specialised units and a lack of heavy firepower, and thus require a degree of cunning gameplay to win.

Ordos
Completing higher missions gives authorization to use improved technology and higher-order weaponry unique to each House, ensuring varied gameplay. For example, House Harkonnen may be able to construct their Devastator tanks with heavy armor and ordnance but cannot build the similarly impressive Atreides Sonic Tank. The Ordos have access to the Deviator - a specialized tank firing a nerve gas that switches the allegiance of targeted units to Ordos for a limited period of time. The three Houses also are restricted in their production capabilities - House Ordos cannot build Atreides-style trikes, instead making the faster "Raider" trikes, while House Harkonnen constructs heavier but more expensive quad bikes.

A player can gain access to other Houses' special units by capturing an enemy Factory and manufacturing the desired units at the captured Factory (House Atreides' Heavy Vehicle Factory for Sonic Tank, House Ordos' Light Vehicle Factory for Raider trikes, House Ordos' Heavy Vehicle Factory for Deviator tanks, or House Harkonnen's Heavy Vehicle Factory for Devastator tanks).