Rather that focusing on the military operations in most war games, this game puts you in the shows of the civilians during times of war. It is a dark survival game, as you control a group of innocent bystanders within a besieged city. Your task is to keep everyone alive.

Source: http://www.gamemob.com/news/11-bit-studios-introduces-this-war-of-mine-epic-trailer/

Looks good!