Overwatch, is a 6v6 fps, class based shooter, where you play as futuristic dystopian heroes. Overwatch currently has 21 different maps -- basically, areas in which the actual game takes place. Those maps vary wildly in size and construction. One map may find players escorting a priceless artifact through the streets of a futuristic African city; another has them fighting over a small piece of territory in a research station on the Moon. These maps are split into four different modes: Assault, escort, hybrid and control. There are also 32 playable characters being from Tanks, damages and healers. These roles change your playstyle.
