In gaming, simulation often refers to the genre of games (simulator games or simulators) that realistically recreates an experience (such as most flight simulators) or gives you an open-ended sandbox game environment that lets you interact with the simulation (such as Sim City).
Vectrex games that go under the Simulation genre include Moon Lander and Star Trek: The Motion Picture.
This article uses material from the Simulation Gaming Wikia article and is licensed under the Creative Commons Attribution-Share Alike License.