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

A game in which the player is not constrained to achieving specific goals and has a large degree of freedom to explore, interact with, or modify the game environment 

The larger universe outside of Earth's atmosphere. Sometimes really, really far outside of it.

Games where the primary goal is keeping the player character alive under harsh circumstances such as dwindling resources or a hostile environment.