Commandos 2: Men of Courage
It can be a difficult game, especially at first, but Commandos 2 truly evokes the intensity of World War II that you've probably seen in film or on television.
This War of Mine
This War of Mine is a dark survival game where players control a group of civilians trying to stay alive in a besieged city.
Dungeon of the Endless
Dungeon of the Endless is a rogue-like dungeon defense game with a pinch of RPG.