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First-Person Shooter refers to a genre where the camera is at the same place as your eyes: you see (on screen) the scenes just like you'd experience it.

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.