A real-time strategy and simulation game that has multiplayer is Stronghold 2. It was released in 2005 and rated T (for Teen). It is only available on PC and that through Steam.
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{"name": "Stronghold 2", "release_year": "2005", "esrb": "T (for Teen)", "genres": "real-time strategy, simulation", "has_multiplayer": "yes", "platforms": "PC", "available_on_steam": "yes", "intention": "inform"}
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