Games like The Last Cube
Games like The Last Cube include Portal, The Talos Principle 2, Portal 2, LIMBO, and COCOON. We matched them by the tags players give The Last Cube on Steam (3D Platformer, Puzzle, Puzzle Platformer, Difficult, and 3D): closest matches first, and among equally close ones the better-known games.

Portal
Shared: Puzzle · Puzzle Platformer · 3D Platformer

The Talos Principle 2
Shared: Puzzle · Puzzle Platformer · 3D Platformer

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

LIMBO
Shared: Puzzle Platformer · Puzzle · Indie

COCOON
Shared: Puzzle · Puzzle Platformer · 3D

The Pedestrian
Shared: Puzzle · Puzzle Platformer · Logic

Stray
Shared: Puzzle · Atmospheric · Adventure

Little Nightmares
Shared: Puzzle Platformer · Puzzle · Atmospheric

The Last Campfire
Shared: Puzzle · 3D Platformer · Adventure

The Talos Principle
Shared: Puzzle · Sci-fi · Atmospheric

Viewfinder
Shared: Puzzle · Puzzle Platformer · 3D Platformer

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

Baba Is You
Shared: Puzzle · Difficult · Logic

Defy Gravity Extended
Shared: Puzzle Platformer · Puzzle · Difficult

The Witness
Shared: Puzzle · Colorful · Difficult

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

Lightmatter
Shared: Puzzle · Logic · 3D

Pumpkin Jack
Shared: 3D Platformer · Colorful · Third Person

Monument Valley 3
Shared: Puzzle · Colorful · 3D Platformer

The Ball
Shared: 3D Platformer · Puzzle Platformer · Puzzle

Chants of Sennaar
Shared: Puzzle · Colorful · Adventure

Braid
Shared: Puzzle · Puzzle Platformer · Difficult

Quantum Conundrum
Shared: Puzzle · 3D Platformer · Puzzle Platformer

Moncage
Shared: Puzzle · Casual · 3D