Games like Not Alone: Classic
Games like Not Alone: Classic include Hollow Knight, PEAK, GRIS, Firewatch, and Stray. We matched them by the tags players give Not Alone: Classic on Steam (Downloadable Content): closest matches first, and among equally close ones the better-known games.

Hollow Knight
Shared: Single-player · Steam Achievements · Family Sharing

PEAK
Shared: Single-player · Steam Achievements · Family Sharing

GRIS
Shared: Single-player · Steam Achievements · Family Sharing

Firewatch
Shared: Single-player · Adventure · Steam Achievements

Stray
Shared: Single-player · Adventure · Steam Achievements

To the Moon
Shared: Single-player · Steam Achievements · Indie

The Binding of Isaac: Rebirth
Shared: Single-player · Steam Achievements · Indie

Slime Rancher
Shared: Single-player · Steam Achievements · Adventure

Little Nightmares
Shared: Single-player · Steam Achievements · Adventure

Samsara Room
Shared: Single-player · Indie · Steam Achievements

There Is No Game: Wrong Dimension
Shared: Single-player · Indie · Steam Achievements

Totally Accurate Battle Simulator
Shared: Single-player · Steam Achievements · Family Sharing

OneShot
Shared: Single-player · Steam Achievements · Indie

Dead Cells
Shared: Single-player · Adventure · Steam Achievements

ARK: Survival Evolved
Shared: Single-player · Steam Achievements · Family Sharing

OMORI
Shared: Single-player · Steam Achievements · Indie

The Stanley Parable
Shared: Single-player · Indie · Steam Achievements

Tomb Raider Game of the Year
Shared: Single-player · Adventure · Steam Achievements

Sons Of The Forest
Shared: Single-player · Steam Achievements · Family Sharing

Hades
Shared: Single-player · Steam Achievements · Family Sharing

Starbound
Shared: Single-player · Steam Achievements · Family Sharing

Florence
Shared: Single-player · Indie · Steam Achievements

INSIDE
Shared: Single-player · Steam Achievements · Family Sharing