Games like Lost In Memories
Games like Lost In Memories include Firewatch, What Remains of Edith Finch, Outer Wilds, A Plague Tale: Requiem, and PEAK. We matched them by the tags players give Lost In Memories on Steam (Adventure, Interactive Fiction, Exploration, 2D, and Cinematic): closest matches first, and among equally close ones the better-known games.

Firewatch
Shared: Adventure · Exploration · First-Person

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

Outer Wilds
Shared: Exploration · Adventure · Mystery

A Plague Tale: Requiem
Shared: Adventure · Exploration · Cinematic

PEAK
Shared: Adventure · Exploration · First-Person

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

Poppy Playtime
Shared: First-Person · Dark · Adventure

The Forgotten City
Shared: Adventure · Exploration · Mystery

Amnesia: A Machine For Pigs
Shared: Exploration · First-Person · Interactive Fiction

Slime Rancher
Shared: Adventure · Exploration · First-Person

Tiny Bunny
Shared: Dark · 2D · Interactive Fiction

Until Dawn™
Shared: Adventure · Interactive Fiction · Choices Matter

Still Wakes the Deep
Shared: First-Person · Adventure · Gore

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

Outlast
Shared: First-Person · Adventure · Gore

Five Nights at Freddy's: Into the Pit
Shared: Adventure · 2D · Exploration

Road 96
Shared: Adventure · First-Person · Choices Matter

Killer Frequency
Shared: Adventure · Interactive Fiction · First-Person

SOMA
Shared: Exploration · Dark · First-Person

Hollow Knight: Silksong
Shared: 2D · Exploration · Adventure

LIMBO
Shared: Adventure · 2D · Dark

ROUTINE
Shared: Adventure · Cinematic · Dark

The Casting of Frank Stone™
Shared: Adventure · Choices Matter · Cinematic

The Forest
Shared: Adventure · Exploration · First-Person