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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 can be played using only a mouse or other pointing device, and don't require any other input.

Only requires a single button (commonly the left mouse button or a single key on the keyboard) to operate the game's controls or interact with it.