Games like A Wonder
Games like A Wonder include Little Nightmares, Portal, Chained Together, Portal 2, and LIMBO. We matched them by the tags players give A Wonder on Steam (3D Platformer, Puzzle Platformer, Third Person, Free to Play, and Adventure): closest matches first, and among equally close ones the better-known games.

Little Nightmares
Shared: Puzzle Platformer · Adventure · Horror

Portal
Shared: Puzzle Platformer · 3D Platformer · Puzzle

Chained Together
Shared: Adventure · Puzzle Platformer · 3D Platformer

Portal 2
Shared: Puzzle Platformer · 3D Platformer · Puzzle

LIMBO
Shared: Puzzle Platformer · Indie · Adventure

Rise of the Tomb Raider™
Shared: Adventure · Third Person · Female Protagonist

Little Nightmares II
Shared: Adventure · Horror · Puzzle Platformer

INSIDE
Shared: Puzzle Platformer · Indie · Horror

Tomb Raider Game of the Year
Shared: Third Person · Adventure · Female Protagonist

Contrast
Shared: Adventure · Indie · Female Protagonist

Papo & Yo
Shared: 3D Platformer · Puzzle Platformer · Adventure

DreadOut
Shared: Third Person · Adventure · Indie

COCOON
Shared: Puzzle Platformer · Adventure · Indie

Planet of Lana
Shared: Puzzle Platformer · Female Protagonist · Adventure

A Hat in Time
Shared: 3D Platformer · Adventure · Indie

The Last Campfire
Shared: Adventure · Indie · Puzzle

Shady Part of Me
Shared: Indie · 3D Platformer · Adventure

Brothers - A Tale of Two Sons
Shared: Adventure · Controller · Indie

A Plague Tale: Innocence
Shared: Adventure · Third Person · Female Protagonist

Praey for the Gods
Shared: 3D Platformer · Adventure · Puzzle Platformer

Trine 3: The Artifacts of Power
Shared: Puzzle Platformer · 3D Platformer · Controller

Monument Valley
Shared: Adventure · Casual · Puzzle

DARQ: Complete Edition
Shared: Adventure · Puzzle Platformer · Horror

Stray
Shared: Adventure · Third Person · Singleplayer