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

Pixel Art refers to the charming, simplistic, retro/renaissance style of very-low-resolution graphics, such as from the 1977-1995 Atari, GameBoy, & Super Nintendo (SNES) eras.

Taking place after a huge catastrophe (eg. man made or natural disaster). See also the more political theme dystopian.