80		Enemy Zero (Windows, 1998)
80		Master Reboot (Windows, 2013)
54		Robert D. Anderson & the Legacy of Cthulhu (Windows, 2007)
53		Silent Hill: Homecoming (Windows, 2008)
52		Realms of the Haunting (DOS, 1997)
52		Devil's Tuning Fork (Windows, 2009)
51		Omikron: The Nomad Soul (Windows, 1999)
50		Cybercon III (DOS, 1992)
50		State of Mind (Windows, 2018)
50		Inca II: Nations of Immortality (DOS, 1994)
50		Star Trek: Deep Space Nine - Harbinger (DOS, 1995)
50		Evil Tag (Windows, 2017)
50		Doorways: Holy Mountains of Flesh (Windows, 2016)
50		Isle of the Dead (DOS, 1993)
50		Astral Domine (Windows, 2016)
50		White Day: A Labyrinth Named School (Windows, 2001)
50		Geisterjäger John Sinclair: Evil Attacks (Windows, 1998)
50		Albedo: Eyes from Outer Space (Windows, 2015)
50		Realms of the Haunting (Windows, 2011)
50		Horror in the Asylum (Windows, 2016)
50		Des Blood (Windows, 1997)
40		Share (Windows, 2016)
40		Tunnels of Despair (Windows, 2018)
40		Phasmophobia: Hall of Specters 3D (Windows, 2016)

Notes: Games similar to Firestart, Games like Firestart, Windows, Action, Adventure, Sci-Fi, Futuristic, Puzzle elements, Shooter, Horror, 1st-person, Blitz3D, PC, Game Similarities.