Games like Nachtmahr
Games like Nachtmahr include Chained Together, FEZ, LIMBO, Spirit of the North, and ANIMAL WELL. We matched them by the tags players give Nachtmahr on Steam (Adventure, Casual, Platformer, Puzzle, and 3D Platformer): closest matches first, and among equally close ones the better-known games.

Chained Together
Shared: Adventure · Platformer · Casual

FEZ
Shared: Platformer · Puzzle · Adventure

LIMBO
Shared: Platformer · Puzzle · Puzzle Platformer

Spirit of the North
Shared: Adventure · Casual · Puzzle

ANIMAL WELL
Shared: Puzzle · Exploration · Platformer

Moncage
Shared: Casual · Puzzle · Adventure

COCOON
Shared: Adventure · Puzzle · Exploration

Portal 2
Shared: Platformer · Puzzle · Puzzle Platformer

Legacy of Kain™ Soul Reaver 1&2 Remastered
Shared: Adventure · Platformer · Puzzle

Monument Valley
Shared: Adventure · Puzzle · Casual

A Story About My Uncle
Shared: Adventure · Platformer · 3D Platformer

FAR: Lone Sails
Shared: Adventure · Exploration · Puzzle

Little Nightmares
Shared: Adventure · Puzzle · Puzzle Platformer

Sonic Frontiers
Shared: Adventure · 3D Platformer · Exploration

The Last Campfire
Shared: Adventure · Puzzle · Atmospheric

White Shadows
Shared: Adventure · Puzzle · Platformer

Stray
Shared: Adventure · Exploration · Puzzle

RiME
Shared: Adventure · Puzzle · Exploration

Refunct
Shared: 3D Platformer · Casual · Platformer

Papo & Yo
Shared: Adventure · 3D Platformer · Puzzle

GRIS
Shared: Adventure · Platformer · Atmospheric

Omno
Shared: Adventure · Exploration · Platformer

Nihilumbra
Shared: Adventure · Platformer · Casual

Brothers - A Tale of Two Sons
Shared: Adventure · Puzzle · Atmospheric