Continuation of the history of Marcus Phoenix, a soldier guarding the exoplanet Sera. the game is also a representative of the genre of military sci-fi, gameplay, it's a third-person shooter from the same developers. The game is famous for its signature assault-rifle with a chainsaw attached.

The second part of the COG troops continues to fight against The Locust Horde, which wants to destroy all the cities of people on the planet. This time, the main events unfold in the territory of The Horde: Delta Squad led by Marcus Phoenix, sent to the very abyss of the enemy rear. The plot campaign can be held alone or in a cooperative mode: the second player takes control of the best friend of Marcus Dominic Santiago.

The game almost did not change its mechanics, new ones were added to the existing multiplayer modes: five to five battles between humans and aliens and The Horde mode, in which players need to stand in front of the constantly growing forces of the rival.