Games like Tone
Games like Tone include LIMBO, Braid, Planet of Lana, Trine 2: Complete Story, and Öoo. We matched them by the tags players give Tone on Steam (2D Platformer, Puzzle Platformer, Puzzle, Platformer, and 2D): closest matches first, and among equally close ones the better-known games.

LIMBO
Shared: Puzzle Platformer · Puzzle · Platformer

Braid
Shared: Puzzle Platformer · 2D Platformer · Puzzle

Planet of Lana
Shared: Puzzle Platformer · 2D Platformer · Puzzle

Trine 2: Complete Story
Shared: Puzzle Platformer · 2D Platformer · Platformer

Öoo
Shared: Puzzle Platformer · 2D Platformer · Puzzle

The Pedestrian
Shared: Puzzle Platformer · Puzzle · 2D Platformer

Mind Over Magnet
Shared: Puzzle Platformer · Puzzle · 2D Platformer

INSIDE
Shared: Puzzle Platformer · Puzzle · Atmospheric

Defy Gravity Extended
Shared: Puzzle Platformer · Platformer · Puzzle

Laughing to Die
Shared: Puzzle · 2D Platformer · Platformer

Hook
Shared: Puzzle · Casual · Abstract

Strange Jigsaws
Shared: Puzzle · 2D · Casual

FEZ
Shared: Puzzle · Platformer · Puzzle Platformer

Neva
Shared: Platformer · Puzzle · 2D Platformer

Hue
Shared: Puzzle · Puzzle Platformer · Platformer

Webbed
Shared: 2D Platformer · Puzzle Platformer · 2D

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

Munin
Shared: Puzzle Platformer · Puzzle · Platformer

Portal 2
Shared: Puzzle · Platformer · Puzzle Platformer

Zup! S
Shared: Puzzle · 2D · Casual

KarmaZoo
Shared: 2D Platformer · Puzzle · Platformer

Zup! F
Shared: Puzzle · Casual · 2D

Zup!
Shared: Puzzle · Casual · 2D

Nihilumbra
Shared: Puzzle · Platformer · Puzzle Platformer