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For that old school look and feel.

Games with a viewpoint that is outside the first person view of the character, commonly over the shoulder or above the head.

Unity is a game engine for 2D, 3D, AR and more

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.