The latest trailer for 2K Games’ XCOM: Enemy Unknown highlights the sacrifices players are going to have to make if they hope to push back the alien invasion. As commander, gamers will have to balance sending soldiers to die with the costs of training those soldiers.

XCOM: Enemy Unknown is a sequel to the original XCOM, which was released nearly two decades ago in 1993. The sequel will feature action and strategy gameplay, as gamers have to recruit and train soldiers, perform research, and develop tactics to combat an alien invasion. If gamers are looking for some good interplanetary-war science fiction gaming this fall that isn’t Halo 4, XCOM might be a good option.

The game is scheduled for release on October 9th in the U.S. Check out the “Casualties of War” trailer below to see some of the frightening, brutal enemies and valiant soldiers that will clash in XCOM: Enemies Unknown.