Despite the name, the game is the fourth in the series and the first in the franchise, which uses stereoscopic 3D technology and PlayStation Move controllers. The plot of the game is a direct continuation of the second part: the action unfolds right after its ending.
I.S.A. forces took the palace of Visari. The emperor had perished, and the main characters face danger again: the enemies regrouped and are preparing to strike back. The the main character squad is forced to fight through the enemy lines only to get to the evacuation point. One of the narrative features is that the story also unfolds from the main antagonists’ point of view.
The gameplay is still cinematic and has not changed much compared to the last part. Jetpacks were added to the game, and the hand-to-hand combat system was reworked, adding new brutal melee attacks and combo attacks. In addition to the ability to go through a story campaign together with a friend on one console, the game has a full-fledged multiplayer with three modes: Guerilla Warfare, Warzone, and Operations.