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When jumping over obstacles is one of the main actions, challenges, or mechanics of the game.

Uses two-dimensional "sprites", 2D images created and used on a flat plane, as opposed to the three-dimensional models or environments found in 3D games.

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 which have short playtimes and can usually be completed in one sitting.