Games like NEH
Games like NEH include Little Nightmares, Little Nightmares II, INSIDE, LIMBO, and Poppy Playtime. We matched them by the tags players give NEH on Steam (Adventure, Horror, Dark, Atmospheric, and Puzzle): closest matches first, and among equally close ones the better-known games.

Little Nightmares
Shared: Horror · Adventure · Atmospheric

Little Nightmares II
Shared: Adventure · Horror · Dark

INSIDE
Shared: Dark · Atmospheric · Horror

LIMBO
Shared: Dark · Puzzle · Puzzle Platformer

Poppy Playtime
Shared: Horror · Puzzle · Dark

Inside the Backrooms
Shared: Horror · Puzzle · Adventure

The Room
Shared: Puzzle · Adventure · Atmospheric

The Room Two
Shared: Puzzle · Atmospheric · Horror

Little Nightmares III
Shared: Adventure · Horror · Puzzle

The Room Three
Shared: Adventure · Puzzle · Atmospheric

DARQ: Complete Edition
Shared: Horror · Adventure · Dark

REANIMAL
Shared: Horror · Adventure · Atmospheric

Outlast
Shared: Horror · Atmospheric · Adventure

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

Seen
Shared: Dark · Adventure · Puzzle

Human Fall Flat
Shared: Adventure · Puzzle · Sandbox

Backrooms: Escape Together
Shared: Horror · Atmospheric · Adventure

Stray
Shared: Adventure · Atmospheric · Puzzle

PEAK
Shared: Adventure · Atmospheric · Online Co-Op

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

Fran Bow
Shared: Horror · Adventure · Puzzle

SOMA
Shared: Horror · Atmospheric · Dark

Bendy and the Ink Machine
Shared: Horror · Puzzle · Dark

Escape the Backrooms
Shared: Horror · Adventure · Online Co-Op