80		Alien Logic (DOS, 1994)
79		Silverfall (Windows, 2007)
76		Torchlight (Windows, 2009)
74		Torchlight II (Windows, 2012)
74		Alien Shooter: Vengeance (Windows, 2007)
74		Diablo III (Windows, 2012)
74		Greed: Black Border (Windows, 2009)
73		Marvel Ultimate Alliance (Windows, 2006)
73		Diablo (Windows, 1996)
72		Sacred (Windows, 2004)
72		Nox (Windows, 2000)
70		Ancient Evil: Curse of the Snake Cult (Windows, 2001)
70		Moon Hunters (Windows, 2016)
70		Soulblight (Windows, 2018)
70		Marvel Ultimate Alliance 2 (Windows, 2016)
70		The Faery Tale Adventure: Book I (DOS, 1989)
63		Dungeon Siege II (Windows, 2005)
62		Dungeon Siege (Windows, 2002)
62		Dawn of Magic (Windows, 2005)
49		Legend: Hand of God (Windows, 2007)
47		Dungeon Siege III (Windows, 2011)
45		Bastion (Windows, 2011)
45		X-Men: Legends II - Rise of Apocalypse (Windows, 2005)
44		Titan Quest (Windows, 2006)
43		Time of Shadows (Windows, 2006)
43		Fatal Labyrinth (Windows, 2010)
43		Hazen (Windows, 2010)
42		The Bard's Tale (Windows, 2005)
42		Restricted Area (Windows, 2005)
42		Pagan: Ultima VIII (DOS, 1994)
41		Revenant (Windows, 1999)
41		Mass Effect 2 (Windows, 2010)
41		Alexander: The Heroes Hour (Windows, 2004)
40		Ancient Evil (Windows, 1998)
40		Heroes Evolved (Windows, 2017)
40		Ys II: Ancient Ys Vanished - The Final Chapter (Windows, 2017)
40		9th Dawn (Windows, 2017)
40		Graveyard Keeper (Windows, 2018)
40		Star Wars: Galaxies - An Empire Divided (Windows, 2003)
40		Albion Online (Windows, 2018)
40		Akaneiro: Demon Hunters (Windows, 2013)
40		Mytheon (Windows, 2015)
40		Throne of Darkness (Windows, 2001)
40		NightStone (Windows, 2002)
40		Grim Dawn (Windows, 2016)
40		Book of Demons (Windows, 2016)
40		Final Fantasy III (Windows, 2015)
40		9th Dawn II (Windows, 2016)
40		DarkStory Online (Windows, 2016)

Notes: Games similar to Space Siege, Games like Space Siege, Gas Powered Games Corp., SEGA of America, Inc., Windows, Role-Playing, RPG, Sci-Fi, Futuristic, Action RPG, Real-Time, Bird's-eye view, 2D scrolling, PhysX, Space station, Spaceship, PC, Game Similarities.