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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.

Three-dimensional graphics, environments, and gameplay mechanics.

Games that can be played by more than one player, either locally or online.

Unity is a game engine for 2D, 3D, AR and more