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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.

16 pixels by 16 pixels is a common resolution for assets matching a low-res pixel art aesthetic. Although the assets may not be specifically 16x16, they are designed to work in a graphical setting where objects are around that size.

Science-fiction. Commonly including things like aliens, advanced technology, and settings of outer space or distant planets.