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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.

Games that don't have vilolence as a primary component.

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

Games that can be played alone