Dune

The player takes the role of the commander of one of the three interplanetary houses, the Atreides, the Harkonnen or the Ordos, with the objective of wresting control of Arrakis from the other two houses. House Ordos is not featured in the Dune novels and is mentioned only in the non-canon The Dune Encyclopedia. The basic strategy in the game is to harvest spice from the treacherous sand dunes using a harvester vehicle, convert the spice into credits via a refinery, and to build military units with these acquired credits in order to fend off and destroy the enemy. The game map initially starts with a fog of war covering all area which is not covered by the player's units range of view. As the units explore the map, the darkness is removed. Unlike later games such as Warcraft II: Tides of Darkness, the fog of war is lifted forever with initial exploration; it does not become dark once more when units leave the area. In addition to enemy incursions, there are other dangers such as the marauding, gigantic sandworm, capable of swallowing vehicles and infantry whole but blocked by rocky terrain. The player can only build on rocky terrain and must build concrete foundations to avoid deterioration of the structures due to the harsh weather conditions. Structures will still gradually decay over time regardless of the presence of those concrete slabs, but they save repair costs in the long run. Spice fields are indicated by orange coloration on the sand, darker orange indicating high concentration. Some spice may be concealed as bumps on the terrain (a "spice bloom") that become spice fields when they are shot at, or when a unit runs over them (the unit is destroyed in the ensuing "spice blow"). A map of the planet Arrakis is shown before most missions, where the player can choose the next territory to play in among two or three. This affects primarily the enemy house fought in the next mission, as all missions except the first two require the destruction of the enemy. Nine territories must be fought, irrespective of house, to reach the endgame. Some key elements that first appeared in Dune II and later appear in many other RTS games include: A world map from which the next mission is chosen Resource-gathering to fund unit construction Simple base and unit construction Building construction dependencies (technology tree) Mobile units that can be deployed as buildings Different sides/factions (the Houses), each with unique unit-types and super weapons A context-sensitive mouse cursor to issue commands (introduced in the Mega Drive/Genesis version) Completing higher missions gives authorization to use improved technology and higher-order weaponry unique to each House, ensuring varied game play. 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 eschews trikes completely, building only the heavier, more expensive "Quad" light attack vehicle. A player can gain access to other Houses' special units by capturing an enemy Factory and manufacturing the desired units at the captured Factory. Buildings may only be built in rocky zones and connected to another existing building. To protect them from constant wear, the player must first place concrete slabs in the construction areas. Production buildings can be upgraded at a cost several times, allowing the production of more advanced units or buildings. The final prize for the commander is the building of the House Palace from where superweapons may be unleashed on opponents in the final closing chapters of the game. The House Harkonnen superweapon is a long-range powerful but inaccurate finger of missiles called the Death Hand, whereas House Atreides may call upon the local Fremen infantry warriors, over which the player has no control, to engage enemy targets. House Ordos may unleash a fast-moving Saboteur whose main purpose is the destruction of buildings. The AI of Dune II was one of the first used in RTS games, and while better than that of Herzog Zwei, it has various drawbacks. Examples include only attacking the side of the player's base facing its own, and general inability to perform flanking maneuvers. Research into the game's engine revealed that the AI is in fact capable of more advanced strategy, but that a large part of these capabilities is unused due to consistently repeated errors in all of the game's mission scripts.