Games like Visiting Grandma
Games like Visiting Grandma include Firewatch, What Remains of Edith Finch, Layers of Fear (2016), Amnesia: A Machine For Pigs, and CARIMARA: Beneath the forlorn limbs. We matched them by the tags players give Visiting Grandma on Steam (Adventure, Walking Simulator, Exploration, Hidden Object, and 3D): closest matches first, and among equally close ones the better-known games.

Firewatch
Shared: Adventure · Walking Simulator · Atmospheric

What Remains of Edith Finch
Shared: Walking Simulator · Adventure · Exploration

Layers of Fear (2016)
Shared: Walking Simulator · Atmospheric · Adventure

Amnesia: A Machine For Pigs
Shared: Walking Simulator · Exploration · First-Person

CARIMARA: Beneath the forlorn limbs
Shared: Adventure · Exploration · 3D

SOMA
Shared: Atmospheric · Exploration · Horror

Outer Wilds
Shared: Exploration · Adventure · Atmospheric

The Beginner's Guide
Shared: Walking Simulator · Adventure · First-Person

PEAK
Shared: Adventure · Exploration · First-Person

Scanner Sombre
Shared: Walking Simulator · Exploration · Adventure

Mouthwashing
Shared: Atmospheric · Walking Simulator · Horror

Platform 8
Shared: Adventure · Walking Simulator · Hidden Object

The Exit 8
Shared: Exploration · Walking Simulator · First-Person

Psalm 5:9-13
Shared: Exploration · Walking Simulator · Horror

Still Wakes the Deep
Shared: Walking Simulator · First-Person · Adventure

Gone Home
Shared: Walking Simulator · Exploration · First-Person

Millennium Dream
Shared: Adventure · Walking Simulator · Exploration

Bad Parenting 1: Mr. Red Face
Shared: Adventure · Walking Simulator · 3D

POOLS
Shared: Walking Simulator · Exploration · Atmospheric

The Park®
Shared: Walking Simulator · Adventure · First-Person

INFRA
Shared: Exploration · Walking Simulator · Adventure

Quern - Undying Thoughts
Shared: Adventure · Exploration · Walking Simulator

The Suicide of Rachel Foster
Shared: Walking Simulator · Adventure · Exploration

The Vanishing of Ethan Carter
Shared: Walking Simulator · Exploration · Adventure