Games like Missing Hiker
Games like Missing Hiker include Poppy Playtime, Outlast, Mouthwashing, Little Nightmares II, and Dark Deception. We matched them by the tags players give Missing Hiker on Steam (Horror, Free to Play, Psychological Horror, Retro, and Atmospheric): closest matches first, and among equally close ones the better-known games.

Poppy Playtime
Shared: Horror · Free to Play · Singleplayer

Outlast
Shared: Horror · Psychological Horror · Atmospheric

Mouthwashing
Shared: Horror · Psychological Horror · Retro

Little Nightmares II
Shared: Horror · Singleplayer · Psychological Horror

Dark Deception
Shared: Horror · Free to Play · Psychological Horror

Layers of Fear (2016)
Shared: Horror · Psychological Horror · Atmospheric

Outlast 2
Shared: Horror · Psychological Horror · Singleplayer

No, I'm not a Human
Shared: Horror · Psychological Horror · Singleplayer

Visage
Shared: Horror · Psychological Horror · Singleplayer

Little Nightmares
Shared: Horror · Atmospheric · Singleplayer

Ultimate Custom Night
Shared: Horror · Free to Play · Singleplayer

Phasmophobia
Shared: Horror · Psychological Horror · Multiplayer

SOMA
Shared: Horror · Psychological Horror · Atmospheric

MiSide
Shared: Psychological Horror · Horror · Singleplayer

Slender: The Arrival
Shared: Horror · Psychological Horror · Multiplayer

Buckshot Roulette
Shared: Horror · Multiplayer · Dark

Firewatch
Shared: Atmospheric · Adventure · Singleplayer

Escape the Backrooms
Shared: Horror · Psychological Horror · Multiplayer

Fears to Fathom - Norwood Hitchhike
Shared: Horror · Psychological Horror · Retro

From The Darkness
Shared: Horror · Psychological Horror · Dark

No one lives under the lighthouse Director's cut
Shared: Horror · Atmospheric · Psychological Horror

Garten of Banban
Shared: Horror · Psychological Horror · Singleplayer

ParanormalHK
Shared: Horror · Psychological Horror · Multiplayer

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