A modular portable gaming simulator system includes a transport trailer with at least one movable sidewall to which two or more gaming simulation stations are attached. The movable sidewall can be selectively raised and lowered between a transport or upright position for transporting the system, and a deployed or active position for displaying and operating the gaming simulation stations. The gaming simulation stations are interconnected so that the gaming simulation stations can interactively execute a software program application, such as in head-to-head competition. In the deployed position, the movable sidewall forms a stage on which the gaming simulation stations rest. In order to transport the system, the sidewall is raised into the upright or transportable position for transportation. During transportation, the gaming simulation stations remain attached to the sidewall in a horizontal, sideways position.