Games like Turtle vs. Portal
Games like Turtle vs. Portal include FEZ, ANIMAL WELL, LIMBO, The Room 4: Old Sins, and Thank Goodness You're Here!. We matched them by the tags players give Turtle vs. Portal on Steam (Adventure, Cartoon, Puzzle, Exploration, and Hidden Object): closest matches first, and among equally close ones the better-known games.

FEZ
Shared: Puzzle · Platformer · Exploration

ANIMAL WELL
Shared: Puzzle · Exploration · Platformer

LIMBO
Shared: Puzzle · Adventure · Platformer

The Room 4: Old Sins
Shared: Puzzle · Adventure · Point & Click

Thank Goodness You're Here!
Shared: Adventure · Exploration · 2D Platformer

The House of Da Vinci
Shared: Puzzle · Hidden Object · Exploration

Rain World
Shared: Exploration · Survival · Platformer

FAR: Lone Sails
Shared: Adventure · Exploration · Puzzle

Chants of Sennaar
Shared: Adventure · Puzzle · Point & Click

There Is No Game: Wrong Dimension
Shared: Puzzle · Adventure · Point & Click

The Room
Shared: Puzzle · Adventure · Point & Click

Morphopolis
Shared: Puzzle · Adventure · Hidden Object

Webbed
Shared: Exploration · 2D Platformer · Platformer

Neva
Shared: Adventure · Platformer · Puzzle

Öoo
Shared: Puzzle · Exploration · Puzzle Platformer

Monument Valley
Shared: Adventure · Puzzle · Exploration

Milo and the Magpies
Shared: Adventure · Exploration · Hidden Object

Murders on the Yangtze River
Shared: Adventure · Puzzle · Exploration

Labyrinth City: Pierre the Maze Detective
Shared: Adventure · Hidden Object · Puzzle

Portal 2
Shared: Puzzle · Platformer · Adventure

Terraria
Shared: Adventure · Survival · Exploration

Laughing to Die
Shared: Adventure · Puzzle · Platformer

Hollow Knight
Shared: Platformer · Exploration · Adventure

The Room Two
Shared: Puzzle · Adventure · Hidden Object