Games like Not My Child
Games like Not My Child include Resident Evil 4, Resident Evil Village, Resident Evil 2, Onimusha: Way of the Sword, and Resident Evil 7 Biohazard. We matched them by the tags players give Not My Child on Steam (Action, Action-Adventure, Investigation, Singleplayer, and Horror): closest matches first, and among equally close ones the better-known games.

Resident Evil 4
Shared: Action · Horror · Singleplayer

Resident Evil Village
Shared: Action · Horror · Singleplayer

Resident Evil 2
Shared: Singleplayer · Horror · Action

Onimusha: Way of the Sword
Shared: Action · Singleplayer · Action-Adventure

Resident Evil 7 Biohazard
Shared: Horror · Singleplayer · Gore

Resident Evil 3
Shared: Action · Horror · Singleplayer

DOOM Eternal
Shared: Action · Gore · Violent

Resident Evil Requiem
Shared: Action · Horror · Action-Adventure

Trepang2
Shared: Singleplayer · Action · Horror

CARRION
Shared: Action · Gore · Horror

Dead Space
Shared: Horror · Singleplayer · Action-Adventure

Prototype™
Shared: Action · Singleplayer · Gore

Mortal Kombat 11
Shared: Action · Gore · Violent

Manhunt
Shared: Action · Gore · Horror

Outlast 2
Shared: Horror · Singleplayer · Gore

NINJA GAIDEN 4
Shared: Action · Action-Adventure · Gore

DOOM
Shared: Action · Gore · Singleplayer

Wolfenstein II: The New Colossus
Shared: Action · Singleplayer · Gore

People Playground
Shared: Gore · Singleplayer · Violent

Vampire: The Masquerade® - Bloodlines™ 2
Shared: Action · Singleplayer · Gore

Dead by Daylight
Shared: Horror · Gore · Violent

Mortal Kombat X
Shared: Action · Gore · Violent

Dying Light: The Beast
Shared: Action · Horror · Singleplayer

Atomic Heart
Shared: Action · Singleplayer · Action-Adventure