64		Tom Clancy's Ghost Recon: Phantoms (Windows, 2014)
61		Star Wars: Republic Commando (Windows, 2005)
61		Tom Clancy's Ghost Recon: Wildlands (Windows, 2017)
60		Mortal Coil: Adrenalin Intelligence (DOS, 1995)
55		Insurgency (Windows, 2014)
55		ArmA III (Windows, 2013)
43		Squad (Windows, 2015)

Notes: Games similar to Interstellar Marines, Games like Interstellar Marines, Zero Point Software A, S, Zero Point Software A, S, Windows, Action, Sci-Fi, Futuristic, Tactical Shooter, 1st-person, Unity, PC, Game Similarities.