Games like Forever Alone
Games like Forever Alone include GRIS, Hollow Knight, Neva, Chants of Sennaar, and Thank Goodness You're Here!. We matched them by the tags players give Forever Alone on Steam (2D Platformer, Colorful, Adventure, Hand-drawn, and Atmospheric): closest matches first, and among equally close ones the better-known games.

GRIS
Shared: Atmospheric · Adventure · Hand-drawn

Hollow Knight
Shared: Platformer · 2D · Adventure

Neva
Shared: Adventure · Atmospheric · Platformer

Chants of Sennaar
Shared: Adventure · Colorful · Atmospheric

Thank Goodness You're Here!
Shared: Adventure · Hand-drawn · 2D Platformer

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

Night in the Woods
Shared: Adventure · Atmospheric · Stylized

Celeste
Shared: 2D Platformer · Platformer · Adventure

SANABI
Shared: 2D Platformer · Adventure · 2D

MIO: Memories in Orbit
Shared: Atmospheric · Platformer · Colorful

LIMBO
Shared: Atmospheric · Platformer · Adventure

Gorogoa
Shared: Hand-drawn · Atmospheric · Adventure

Rain World
Shared: Atmospheric · Platformer · 2D Platformer

Laughing to Die
Shared: Adventure · 2D Platformer · Hand-drawn

Creaks
Shared: Hand-drawn · Atmospheric · Stylized

Pizza Tower
Shared: 2D Platformer · Platformer · Indie

CONVERGENCE: A League of Legends Story™
Shared: 2D Platformer · Adventure · Colorful

Nine Sols
Shared: Hand-drawn · Platformer · 2D

Thomas Was Alone
Shared: 2D Platformer · Platformer · Atmospheric

Creepy Tale
Shared: Adventure · 2D Platformer · Hand-drawn

The Multi-Medium
Shared: Adventure · Hand-drawn · Colorful

Sonic Superstars
Shared: 2D Platformer · Adventure · Platformer

Old Man's Journey
Shared: Adventure · Hand-drawn · Atmospheric

OMORI
Shared: Hand-drawn · Colorful · Indie