62		DEFCON: Global Nuclear Domination Game (Windows, 2007)
51		Star Trek: Starfleet Command III (Windows, 2002)
50		Starship Tycoon (Windows, 2004)

Notes: Games similar to RimWorld, Games like RimWorld, Ludeon Studios, Ludeon Studios, Windows, Simulation, Strategy, Tactics, Sci-Fi, Futuristic, Real-Time, Top-down, PC, Game Similarities.