99		Pioneer (Windows, 2013)
99		X³: Terran Conflict (Windows, 2008)
99		Elite (DOS, 1987)
99		Escape Velocity Nova (Windows, 2003)
99		X: Rebirth (Windows, 2013)
99		Elite: The New Kind (Windows, 2000)
99		Frontier: First Encounters (DOS, 1995)
99		X³: Reunion (Windows, 2005)
99		Frontier: Elite II (DOS, 1993)
99		Nomad (DOS, 1993)
99		Terminus (Windows, 2000)
83		Space Rogue (Windows, 2016)
82		Wing Commander: Privateer - Gemini Gold (Windows, 2005)
82		Elite Plus (DOS, 1991)
82		Privateer 2: The Darkening (DOS, 1996)
82		Wing Commander: Privateer (DOS, 1993)
81		Darkstar One (Windows, 2006)
81		Space Rogue (DOS, 1989)
80		Wing Commander: Privateer (Windows, 2011)
80		Spaceforce: Rogue Universe (Windows, 2007)
80		Vega Strike (Windows, 2002)
80		Privateer 2: The Darkening (Windows, 1997)
80		Parkan: The Imperial Chronicles (Windows, 1997)
72		Freelancer (Windows, 2003)
70		RiftSpace (Windows, 2004)
62		Independence War 2: Edge Of Chaos (Windows, 2001)
60		Xiphos (DOS, 1990)
60		Starglider II (DOS, 1989)
60		Parkan II (Windows, 2005)
60		Evochron Alliance (Windows, 2005)
60		Battlecruiser Millennium (Windows, 2001)
60		Elite Starfighter (Windows, 2004)
50		Deus (DOS, 1996)
50		Deus (Windows, 1996)
50		Forbes Corporate Warrior (Windows, 1997)
45		Nimbatus: The Space Drone Constructor (Windows, 2018)
44		Vostok Inc. (Windows, 2017)

Notes: Games similar to X4: Foundations, Games like X4: Foundations, EGOSOFT GmbH, EGOSOFT GmbH, Windows, Action, Simulation, Sci-Fi, Futuristic, Managerial, Business Simulation, 1st-person, Space Flight, Simulation - Space trading and combat, X: Beyond the Frontier, PC, Game Similarities.