In the 21st century one thing is inevitable. War can break out anytime, anywhere. And if your city gets under siege, be sure you were not prepared for it.
In This War of Mine for the first time you do not play as an elite soldier, but a group of civilians trying to survive in a besieged city; struggling with lack of necessities and constant danger.
During the day snipers outside stop you from leaving your refuge, so you need to focus on maintaining your hideout. At night, take one of your civilians on a mission to scavenge for items that will help you stay alive.
Make life-and-death decisions driven by your conscience. Try to protect everybody from your shelter. During war, there are no good or bad decisions; there is only survival. The sooner you realize that, the better.