Games like MEGA
Games like MEGA include Outlast, METRO 2033 Redux, METRO Last Light Redux, Metro Exodus, and Poppy Playtime. We matched them by the tags players give MEGA on Steam (Action, Horror, Psychological Horror, Survival Horror, and FPS): closest matches first, and among equally close ones the better-known games.

Outlast
Shared: Horror · Survival Horror · Psychological Horror

METRO 2033 Redux
Shared: Horror · FPS · Action

METRO Last Light Redux
Shared: Action · FPS · Horror

Metro Exodus
Shared: FPS · Action · Horror

Poppy Playtime
Shared: Horror · Survival Horror · First-Person

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

Resident Evil 7 Biohazard
Shared: Horror · Survival Horror · First-Person

Resident Evil Village
Shared: Horror · Survival Horror · Action

Outlast 2
Shared: Horror · Psychological Horror · Survival Horror

Left 4 Dead 2
Shared: FPS · Action · Horror

Ready or Not
Shared: FPS · Horror · Shooter

Resident Evil Requiem
Shared: Horror · Survival Horror · Action

Darkwood
Shared: Horror · Survival Horror · Action

Alien: Isolation
Shared: Horror · Survival Horror · Atmospheric

Amnesia: The Dark Descent
Shared: Horror · Psychological Horror · Survival Horror

Dying Light
Shared: Horror · Survival Horror · First-Person

The Forest
Shared: Horror · Survival · Survival Horror

Inside the Backrooms
Shared: Horror · Survival Horror · Psychological Horror

Dead by Daylight
Shared: Horror · Survival Horror · Survival

SOMA
Shared: Horror · Psychological Horror · Atmospheric

Lethal Company
Shared: Horror · Survival Horror · First-Person

Choo-Choo Charles
Shared: Horror · Survival Horror · First-Person

Bendy and the Dark Revival
Shared: Horror · Action · Survival Horror

Amnesia: The Bunker
Shared: Horror · Survival Horror · Atmospheric