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Games in which the player shoots things to progress, usually with a variety of guns, and other times with bows and arrows.

Typically a graphical style where there are one two colors. (A bit can be either on or off, so two options) Commonly black and white, but can be any combination depending on the style the creator is trying to accomplish. 

Games where the primary goal is keeping the player character alive under harsh circumstances such as dwindling resources or a hostile environment.