Games like Grandma, Is That You?
Games like Grandma, Is That You? include Firewatch, What Remains of Edith Finch, Mouthwashing, Layers of Fear (2016), and The Exit 8. We matched them by the tags players give Grandma, Is That You? on Steam (Casual, Adventure, Walking Simulator, Exploration, and First-Person): closest matches first, and among equally close ones the better-known games.

Firewatch
Shared: Adventure · Walking Simulator · First-Person

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

Mouthwashing
Shared: Walking Simulator · Horror · Psychological Horror

Layers of Fear (2016)
Shared: Walking Simulator · First-Person · Adventure

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

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

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

Fears to Fathom® - Scratch Creek
Shared: Adventure · Casual · Walking Simulator

Fears to Fathom - Woodbury Getaway
Shared: Adventure · Casual · First-Person

The Stanley Parable
Shared: Walking Simulator · First-Person · Adventure

[Chillas Art] The Convenience Store
Shared: Adventure · Casual · Horror

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

CARIMARA: Beneath the forlorn limbs
Shared: Adventure · Exploration · Mystery

Pacify
Shared: Exploration · First-Person · Horror

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

Poppy Playtime
Shared: First-Person · Horror · Adventure

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

Outer Wilds
Shared: Exploration · Adventure · Mystery

Fears to Fathom - Ironbark Lookout
Shared: Adventure · Exploration · Thriller

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

Obduction
Shared: Adventure · Exploration · First-Person

Layers of Fear 2 (2019)
Shared: Walking Simulator · Adventure · Horror

Slime Rancher
Shared: Adventure · Exploration · First-Person

Superliminal
Shared: First-Person · Surreal · Thriller