Sid Meiers Alpha Centauri - Sid Meiers Alpha Centauri is a Turn-based Strategy, Sci-Fi, Single and Multiplayer video game created by Firaxis Games and published by Electronic Arts.
Stronghold - Stronghold Crusader is a RTS game from the series from Stronghold.
Stellaris - Stellaris is an Adventure-based, RTS (Real-time Strategy) Space, Sandbox, Sci-Fi, Single and Multiplayer video game created and published by Paradox Interactive.
Rise of Nations - Rise of Nations was launched back in 2003 but is still considered to be one of the most popular and effective real-time strategy (RTS) games of all time.
Tiger Knight: Empire War - Tiger Knight: Empire War is Action-Adventure, MMORPG, (Massively Multiplayer Online Role-playing Game) War, Combat, Open-World and a Team-based video game published by Oasis Games.
Tropico - Tropico is an Addictive, Strategy, Construction and Management, City Building, Sandbox and Single-player Simulation developed by PopTop Software.