Games like Missing
Games like Missing include No, I'm not a Human, Undertale, Garten of Banban, Legend of Mortal, and The Walking Dead: Saints & Sinners. We matched them by the tags players give Missing on Steam (Horror, Choices Matter, Singleplayer, RPG, and Walking Simulator): closest matches first, and among equally close ones the better-known games.

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

Undertale
Shared: Choices Matter · RPG · Singleplayer

Garten of Banban
Shared: Horror · Singleplayer · VR

Legend of Mortal
Shared: Choices Matter · RPG · Singleplayer

The Walking Dead: Saints & Sinners
Shared: VR · Horror · Singleplayer

Resident Evil 7 Biohazard
Shared: Horror · VR · Singleplayer

Baldur's Gate 3
Shared: Choices Matter · RPG · Singleplayer

FIVE NIGHTS AT FREDDY'S: HELP WANTED
Shared: VR · Horror · Singleplayer

Granny
Shared: Horror · Singleplayer · VR

Half-Life: Alyx
Shared: VR · Horror · Singleplayer

Vampyr
Shared: Choices Matter · RPG · Singleplayer

Ultimate Custom Night
Shared: Horror · Singleplayer · Strategy

Buckshot Roulette
Shared: Horror · Singleplayer · Indie

Quasimorph
Shared: RPG · Singleplayer · Choices Matter

SKALD: Against the Black Priory
Shared: Singleplayer · Horror · Strategy

Five Nights at Freddy's: Help Wanted 2
Shared: VR · Horror · Singleplayer

Disco Elysium - The Final Cut
Shared: Choices Matter · RPG · Singleplayer

Reigns
Shared: Choices Matter · Singleplayer · Indie

Yes, Your Grace
Shared: Choices Matter · Indie · RPG

The Witcher 3: Wild Hunt — Remastered
Shared: RPG · Singleplayer · Choices Matter

Dragon Age: Origins - Ultimate Edition
Shared: RPG · Choices Matter · Singleplayer

Emily Wants To Play
Shared: Horror · VR · Indie

Mount & Blade II: Bannerlord
Shared: RPG · Strategy · Singleplayer

Firework
Shared: Horror · Indie · Singleplayer