Games like Haunted Nightmares
Games like Haunted Nightmares include Darkwood, Outlast, Outlast 2, Resident Evil 4, and The Evil Within. We matched them by the tags players give Haunted Nightmares on Steam (Survival, Mystery Dungeon, Dark Fantasy, Psychological Horror, and Pixel Graphics): closest matches first, and among equally close ones the better-known games.

Darkwood
Shared: Psychological Horror · Survival · Action

Outlast
Shared: Psychological Horror · Survival · Survival Horror

Outlast 2
Shared: Psychological Horror · Survival Horror · Survival

Resident Evil 4
Shared: Action · Survival · Survival Horror

The Evil Within
Shared: Psychological Horror · Survival · Survival Horror

The Outlast Trials
Shared: Psychological Horror · Survival Horror · Survival

DARK SOULS™: REMASTERED
Shared: Dark Fantasy · Action · Dark

Lies of P
Shared: Dark Fantasy · Action · Action RPG

Poppy Playtime
Shared: Psychological Horror · Survival · Dark

Dead by Daylight
Shared: Survival · Survival Horror · Psychological Horror

Ultimate Custom Night
Shared: Survival · Survival Horror · Dark

DARK SOULS™ II: Scholar of the First Sin
Shared: Dark Fantasy · Action · Action RPG

FIVE NIGHTS AT FREDDY'S: HELP WANTED
Shared: Psychological Horror · Survival · Action

DEVOUR
Shared: Survival · Psychological Horror · Survival Horror

FAITH: The Unholy Trinity
Shared: Psychological Horror · Pixel Graphics · Dark

Five Nights at Freddy's
Shared: Psychological Horror · Survival Horror · Survival

Five Nights at Freddy's 2
Shared: Psychological Horror · Survival · Survival Horror

Resident Evil 7 Biohazard
Shared: Survival Horror · Psychological Horror · Survival

Five Nights at Freddy's 4
Shared: Survival Horror · Survival · Dark

Five Nights at Freddy's: Sister Location
Shared: Survival · Survival Horror · Dark

We Happy Few
Shared: Survival · Action · Psychological Horror

IMSCARED
Shared: Psychological Horror · Pixel Graphics · Dark

Slender: The Arrival
Shared: Psychological Horror · Survival Horror · Dark

Resident Evil Village
Shared: Action · Survival Horror · Psychological Horror