44		4K Adventure (DOS, 1998)
44		Once and Future (DOS, 1998)
44		Once and Future (Windows, 1998)
43		Zork: The Undiscovered Underground (Windows, 1997)
42		To Be or Not To Be (Windows, 2015)
41		Pentari: First Light (Windows, 2003)
41		Pentari: First Light (DOS, 2003)
40		Legacy of the Necromancer: Part I - The Adventurers' Museum (DOS, 1989)
40		Myth (DOS, 1989)
40		Zork Zero: The Revenge of Megaboz (DOS, 1989)
40		Advanced Xoru (DOS, 1989)
40		The Usurper: The Mines Of Qyntárr (DOS, 1989)
40		Legacy of the Necromancer: Part III - The Dark Tower (DOS, 1989)
40		Das Stundenglas (DOS, 1990)
40		Legacy of the Necromancer: Part II - The Palace of the Necromancer (DOS, 1989)
40		Versus: The Elite Trials (Windows, 2016)
40		Sorcerer of Claymorgue Castle (DOS, 1993)
40		Adventure in Humongous Cave (DOS, 1993)
40		Fire From Heaven (DOS, 2005)
40		A Journey Into Xanth (DOS, 1993)
40		Adventure in the Magic Land (DOS, 1989)
40		The Awe-Chasm (DOS, 1991)
40		Castle Elsinore (DOS, 1992)
40		Generic Adventure 551 (DOS, 1990)
40		Venom (DOS, 1987)
40		Alabaster (Windows, 2009)
40		Choice of Romance: Affairs of the Court (Windows, 2016)
40		The Sea Eternal (Windows, 2016)
40		The Hermit's Secret (DOS, 1982)
40		Search for the Ultimate Weapon (Windows, 2008)
40		ADV770 (Windows, 2008)
40		The Dreamhold (Windows, 2005)
40		Spellcaster: The Forgotten Spell (Windows, 2014)
40		Spectrum Adventure (Windows, 2007)
40		Enchanter (DOS, 1983)
40		Sorcerer (DOS, 1984)
40		Philosopher's Quest (DOS, 1987)
40		Shard of Inovar (DOS, 1987)
40		Adventure (DOS, 1987)
40		The Pawn (DOS, 1986)
40		Wishbringer (DOS, 1985)
40		Dragonworld (DOS, 1984)
40		Spellbreaker (DOS, 1985)
40		Nine Princes in Amber (DOS, 1985)
40		Lancelot (DOS, 1988)

Notes: Games similar to The New Castle, Games like The New Castle, Software Customization, DOS, Adventure, Fantasy, Interactive Fiction, Text Adventure, PC, Game Similarities.