Games like Phenom
Games like Phenom include Little Nightmares II, Little Nightmares, DISTRAINT: Deluxe Edition, Poppy Playtime, and Sally Face - Episode One. We matched them by the tags players give Phenom on Steam (Puzzle, Sokoban, Top-Down Shooter, Horror, and Pixel Graphics): closest matches first, and among equally close ones the better-known games.

Little Nightmares II
Shared: Puzzle · Horror · Atmospheric

Little Nightmares
Shared: Horror · Atmospheric · Puzzle

DISTRAINT: Deluxe Edition
Shared: Horror · Pixel Graphics · Puzzle

Poppy Playtime
Shared: Puzzle · Horror · Dark

Sally Face - Episode One
Shared: Puzzle · Horror · Dark

LIMBO
Shared: Puzzle · Atmospheric · Dark

SOMA
Shared: Horror · Atmospheric · Dark

Amnesia: The Dark Descent
Shared: Horror · Puzzle · Atmospheric

Pony Island
Shared: Puzzle · Pixel Graphics · Horror

IMSCARED
Shared: Horror · Pixel Graphics · Puzzle

Resident Evil 2
Shared: Horror · Zombies · Puzzle

Fran Bow
Shared: Puzzle · Horror · Psychological Horror

Detention
Shared: Horror · Puzzle · Atmospheric

Endacopia
Shared: Puzzle · Horror · Pixel Graphics

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

The Room Two
Shared: Puzzle · Horror · Atmospheric

Firework
Shared: Puzzle · Horror · Atmospheric

Inside the Backrooms
Shared: Puzzle · Horror · Psychological Horror

INSIDE
Shared: Horror · Atmospheric · Dark

Scorn
Shared: Horror · Puzzle · Atmospheric

DARQ: Complete Edition
Shared: Puzzle · Horror · Dark

ANIMAL WELL
Shared: Puzzle · Pixel Graphics · Horror

Outlast
Shared: Horror · Atmospheric · Psychological Horror

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