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

Portal 2
Shared: Platformer · Puzzle Platformer · Puzzle

Webbed
Shared: 2D Platformer · Puzzle Platformer · Platformer

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

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

LIMBO
Shared: Puzzle Platformer · Platformer · Puzzle

Chained Together
Shared: Platformer · Adventure · Puzzle Platformer

I wanna be the Creator
Shared: Platformer · Level Editor · Action-Adventure

Pikuniku
Shared: Adventure · Casual · Puzzle

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

BattleBlock Theater®
Shared: Platformer · Level Editor · 2D Platformer

Braid
Shared: Puzzle Platformer · 2D Platformer · Platformer

Trine Enchanted Edition
Shared: Puzzle Platformer · 2D Platformer · Action-Adventure

Sonic Superstars
Shared: Platformer · 2D Platformer · Adventure

SANABI
Shared: 2D Platformer · Adventure · Action

Pizza Tower
Shared: 2D Platformer · Platformer · Cartoony

Defy Gravity Extended
Shared: Platformer · Puzzle Platformer · Puzzle

FEZ
Shared: Platformer · Puzzle · Puzzle Platformer

Ori and the Will of the Wisps
Shared: Platformer · Adventure · Action

Öoo
Shared: Puzzle Platformer · 2D Platformer · Platformer

Trine 5: A Clockwork Conspiracy
Shared: Platformer · Adventure · Puzzle Platformer

Human Fall Flat
Shared: Puzzle Platformer · Puzzle · Adventure

Darwin's Paradox!
Shared: Platformer · Action-Adventure · Adventure

ANTONBLAST
Shared: 2D Platformer · Action · 2D

Celeste
Shared: Platformer · 2D Platformer · Adventure