42		Retribution (DOS, 1994)
41		Eye of the Storm (DOS, 1993)
40		Iron Sky: Invasion (Windows, 2012)
40		AX:EL (Windows, 2015)

Notes: Games similar to Defiance, Games like Defiance, Logicware, Inc., Visceral Productions, Windows, Action, Simulation, Sci-Fi, Futuristic, 1st-person, PC, Game Similarities.