Halo Wars

Halo Wars is a real time strategy game that uses species and vehicles seen in previous Halo games as well as new units. The controls use the A-button primarily for selecting via 3 methods; tap to select one unit, double tap to select all units on screen or "paint brush" which selects all units that the "brush" is dragged over. Selecting a unit gives the player the option of commands and selecting certain buildings brings up a "circle menu", said to be the most important menu in the game taking up the whole screen which is used for creating units and buildings. The game's lead developer, Graeme Devine, has said that the emphasis is more on combat than economy; it is necessary for the player to "manage a battle instead of watching it", and while resources are still present they also have alternative forms such as time and the number of units present. Some campaign missions will take the focus off resources but skirmish and multiplayer matches still require management of an economy.

Halo Wars is set in 2531, prior to the events of Halo: Combat Evolved which is set in 2552. It follows the story of the UNSC's discovery of a Forerunner artifact and the first battles with the Covenant after the fall of the first planet, Harvest, to the Covenant. It will allow the player to control the crew and vehicles of a UNSC ship, CFV-88 Spirit of Fire, and receive instructions and commands from its AI Serina. When asked whether it would be possible to play as the Covenant, Ensemble's official response was "stay tuned", however other sources have said the Covenant would be available to play. In an interview on December 21, 2007 Devine explained that Ensemble was concentrating on differentiating the two factions in the single player campaign, but did not confirm or deny that the Covenant would be playable when prompted.

Source of infromation: http://en.wikipedia.org/wiki/Halo_Wars