Games like SEPTEMBER 1999
Games like SEPTEMBER 1999 include Outlast, Poppy Playtime, Outlast 2, Buckshot Roulette, and Dark Deception. We matched them by the tags players give SEPTEMBER 1999 on Steam (Horror, Indie, Psychological Horror, Free to Play, and Multiplayer): closest matches first, and among equally close ones the better-known games.
Outlast
Shared: Horror · Psychological Horror · First-Person
Poppy Playtime
Shared: Horror · Free to Play · Singleplayer
Outlast 2
Shared: Horror · Psychological Horror · Gore
Buckshot Roulette
Shared: Horror · Multiplayer · Indie
Dark Deception
Shared: Horror · Free to Play · Multiplayer
Layers of Fear (2016)
Shared: Horror · Psychological Horror · Indie
Mouthwashing
Shared: Horror · Psychological Horror · Indie
No, I'm not a Human
Shared: Horror · Psychological Horror · Indie
Slender: The Arrival
Shared: Horror · Indie · Multiplayer
Phasmophobia
Shared: Horror · Psychological Horror · Multiplayer
SOMA
Shared: Horror · Psychological Horror · Atmospheric
Visage
Shared: Horror · Psychological Horror · Multiplayer
DEVOUR
Shared: Horror · Multiplayer · Psychological Horror
Still Wakes the Deep
Shared: Horror · Psychological Horror · Gore
Ultimate Custom Night
Shared: Horror · Free to Play · Singleplayer
Resident Evil 7 Biohazard
Shared: Horror · First-Person · Gore
The Outlast Trials
Shared: Horror · Multiplayer · Psychological Horror
Amnesia: The Dark Descent
Shared: Horror · Psychological Horror · Gore
Five Nights at Freddy's
Shared: Horror · Psychological Horror · Indie
Dead by Daylight
Shared: Horror · Multiplayer · Gore
Escape the Backrooms
Shared: Horror · Psychological Horror · Multiplayer
From The Darkness
Shared: Horror · Psychological Horror · Indie
The Beast Inside
Shared: Horror · Multiplayer · First-Person
Ready or Not
Shared: Horror · Multiplayer · Psychological Horror