Games like Make Me Whole
Games like Make Me Whole include What Remains of Edith Finch, Layers of Fear (2016), Firewatch, Poppy Playtime, and SOMA. We matched them by the tags players give Make Me Whole on Steam (Psychological Horror, Horror, Walking Simulator, First-Person, and Atmospheric): closest matches first, and among equally close ones the better-known games.

What Remains of Edith Finch
Shared: Walking Simulator · Atmospheric · First-Person

Layers of Fear (2016)
Shared: Psychological Horror · Horror · Walking Simulator

Firewatch
Shared: Walking Simulator · Atmospheric · Adventure

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

SOMA
Shared: Psychological Horror · Horror · Atmospheric

Amnesia: A Machine For Pigs
Shared: Horror · Walking Simulator · Psychological Horror

Outlast
Shared: Horror · First-Person · Psychological Horror

Inside the Backrooms
Shared: Horror · Psychological Horror · Puzzle

Mouthwashing
Shared: Psychological Horror · Horror · Atmospheric

Garten of Banban
Shared: Horror · Psychological Horror · First-Person

The Exit 8
Shared: Walking Simulator · Horror · Psychological Horror

The Room Two
Shared: Horror · Atmospheric · Puzzle

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

Sally Face - Episode One
Shared: Psychological Horror · Horror · Indie

Visage
Shared: Psychological Horror · Horror · First-Person

Among the Sleep - Enhanced Edition
Shared: Horror · Atmospheric · First-Person

Scanner Sombre
Shared: Horror · Walking Simulator · Psychological Horror

Still Wakes the Deep
Shared: Psychological Horror · Horror · First-Person

Little Nightmares
Shared: Horror · Atmospheric · Adventure

Little Nightmares II
Shared: Horror · Adventure · Psychological Horror

The Park®
Shared: Psychological Horror · Horror · Walking Simulator

Outer Wilds
Shared: Adventure · Atmospheric · Exploration

INFRA
Shared: First-Person · Walking Simulator · Atmospheric

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