82		Demise: Rise of the Ku'tan (Windows, 2000)
65		Mistmare (Windows, 2003)
65		Rubies of Eventide (Windows, 2003)
64		Lineage II: The Chaotic Chronicle (Windows, 2004)
64		Might and Magic IX (Windows, 2002)
63		Dragon Age: Inquisition (Windows, 2014)
63		Eye of the Beholder II: The Legend of Darkmoon (DOS, 1991)
62		Legend of Grimrock II (Windows, 2014)
62		ArchLord (Windows, 2006)
62		Might and Magic VI: The Mandate of Heaven (Windows, 1998)
62		Stonekeep (DOS, 1995)
62		Final Fantasy XII: The Zodiac Age (Windows, 2018)
62		Dark and Light (Windows, 2006)
62		Dungeons & Dragons Online: Stormreach (Windows, 2006)
62		Arcatera: The Dark Brotherhood (Windows, 2000)
62		Wizards & Warriors (Windows, 2000)
62		Might and Magic VII: For Blood and Honor (Windows, 1999)
62		Might and Magic VIII: Day of the Destroyer (Windows, 2000)
61		Allods Online (Windows, 2011)
61		Vanguard: Saga of Heroes (Windows, 2007)
61		Ishar 3: The Seven Gates of Infinity (Windows, 1999)
60		Menzoberranzan (DOS, 1994)
60		Ishar 3: The Seven Gates of Infinity (DOS, 1994)
60		Hexx: Heresy of the Wizard (DOS, 1994)
60		Ishar 2: Messengers of Doom (DOS, 1993)
60		Revelation Online (Windows, 2018)
60		Yendorian Tales: The Tyrants of Thaine (DOS, 1997)
60		Shroud of the Avatar: Forsaken Virtues (Windows, 2018)
60		Towers: Lord Baniff's Deceit (DOS, 1994)
60		Eye of the Beholder III: Assault on Myth Drannor (DOS, 1993)
60		Yendorian Tales: Book I - Chapter 2 (DOS, 1996)
60		Might & Magic X: Legacy (Windows, 2014)
60		Ishar: Legend of the Fortress (DOS, 1992)
60		Stonekeep (Windows, 2008)
60		Eldevin (Windows, 2014)
60		Lamia Must Die (Windows, 2014)
60		Game of Thrones (Windows, 2012)
60		Neverwinter Nights (DOS, 1991)
60		Abandoned Places: A Time for Heroes (DOS, 1992)
60		Keef the Thief: A Boy and His Lockpick (DOS, 1989)
55		Shadowbane (Windows, 2003)
52		Legend of Grimrock (Windows, 2012)
51		Dragon Age II (Windows, 2011)
50		Hyakki Castle (Windows, 2017)
50		Drakkhen (DOS, 1990)
50		Drakkhen (Windows, 2018)

Notes: Games similar to Horizons: Empire of Istaria, Games like Horizons: Empire of Istaria, Artifact Entertainment, Atari, Inc., Windows, Role-Playing, RPG, Fantasy, Persistent, Real-Time, 1st-person, Behind view, PC, Game Similarities.