52		A Night with Troi (DOS, 1991)
52		Xtrek (DOS, 1991)
50		Paranoia (DOS, 1993)
50		Wraith Blaster (DOS, 1993)
45		Star Trek: First Contact (DOS, 1988)
45		The Twilight Zone (DOS, 1988)
45		Guardians of Infinity: To Save Kennedy (DOS, 1988)
44		Stationfall (DOS, 1987)
44		Supernova (DOS, 1987)
44		Timequest (DOS, 1991)
43		Star Trek: The Promethean Prophecy (DOS, 1986)
43		Frederik Pohl's Gateway (DOS, 1992)
42		Demoniak (DOS, 1991)
42		Rendezvous with Rama (DOS, 1985)
42		Dopplegänger (DOS, 1985)
42		Projekt Prometheus (DOS, 1991)
42		Nine Princes in Amber (DOS, 1985)
42		The Adventures of Buckaroo Banzai: Across the Eighth Dimension (DOS, 1985)
42		Star Trek: The Kobayashi Alternative (DOS, 1985)
41		Gateway II: Homeworld (DOS, 1993)
41		Amazon (DOS, 1984)
40		Kingdom Without End (DOS, 2001)
40		Gun Mute (Windows, 2008)
40		Las llaves del tiempo (DOS, 1999)
40		Versus: The Elite Trials (Windows, 2016)
40		Frederik Pohl's Gateway (Windows, 1995)
40		Planetfall (DOS, 1983)
40		Alien (DOS, 1982)
40		Starcross (DOS, 1982)

Notes: Games similar to The Star Portal, Games like The Star Portal, DOS, Adventure, Sci-Fi, Futuristic, Interactive Fiction, Text Adventure, PC, Game Similarities.