Super Robot Wars W

Unlike previous games, the interface is changed slightly to make use of the Nintendo DS's dual screens. While the player may still use the directional pad and buttons, the game also allows for the use of the touch screen stylus. The mini-map feature in previous titles is now fixed on the DS's top screen. When two units engage in battle, the battle sequence is shown on the top screen, while the bottom screen shows a quick summary of the stats of both units, including hit percentages. The screens may be swapped via the system menu.

The game includes the "Combo Attack" system from previous Super Robot Wars titles for the Game Boy Advance. Unlike the system in those games, however, the attacker does not need to target units lined up in a row; instead, all units standing adjacent to one another are applicable, with the maximum number being determined by the pilot's Combo Attack level. An additional "Bazaar Shop", similar to the one seen in Super Robot Wars Alpha Gaiden, is unlockable after completing certain requirements. This shop allows players to buy a selection of units that normally only enemies use. Lastly, the "Favorites Series" system, introduced in Super Robot Wars MX, returns.

Space Calendar (SC) 99. In the previous age, the governments of Earth formed the Federated Earth Nation (FEN) to bring World War III to an end. After putting down the defiant lunar colony, the Federation Space Calendar was instituted. To alleviate environmental pressures and overpopulation, the FEN began expanding into space, constructing space colonies and asteroid cities, as well as an Orbital Space Ring around the Earth, and the development and terraforming of the Moon and Mars. This was accomplished in a short time, due to quantum leaps in physics and energy research.

But repression of those living in the colonies by the FEN ignited a war between factions in space, and OZ, the true leaders of the FEN. This "Revolutionary War" ended in the year 98, with the death of FEN President Treize Khushrenada. From Treize's will, a New United Nations was formed, returning power back to the individual states.