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Games that try to simulate real-world activities (like driving vehicles or living the life of someone else) with as much realism as possible. Simulators generally require more study and orientation than arcade games, and the best simulators are also educational.

Contains (or is themed around interacting with) a musical score, soundtrack, or backing track(s).

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

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