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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.

Games that can be played alone

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

Shambling undead humans who died after being infected by some sort of virus and are now "alive" again, commonly known for the desire to kill living human beings. Commonly paired with the (post-)apocalyptic genre.