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Games that challenge the player with critical thinking to solve levels. 

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

A perspective where the camera is placed directly above the player. Common in 2D games, but can also be used in 3D games.