Games like The Cubes
Games like The Cubes include Portal, Portal 2, Is This Seat Taken?, hololive Treasure Mountain, and Bloons TD 6. We matched them by the tags players give The Cubes on Steam (Casual, Puzzle, 3D, Colorful, and Singleplayer): closest matches first, and among equally close ones the better-known games.

Portal
Shared: Puzzle · Puzzle Platformer · Singleplayer

Portal 2
Shared: Puzzle · Singleplayer · Puzzle Platformer

Is This Seat Taken?
Shared: Casual · Puzzle · Colorful

hololive Treasure Mountain
Shared: Casual · Puzzle · Colorful

Bloons TD 6
Shared: Singleplayer · Casual · 3D

Bejeweled® 3
Shared: Casual · Puzzle · Singleplayer

LEGO® Bricktales
Shared: Puzzle · Colorful · Casual

Monument Valley
Shared: Puzzle · Casual · Singleplayer

Moncage
Shared: Casual · Puzzle · Singleplayer

Assemble with Care
Shared: Casual · Puzzle · Singleplayer

Peggle Deluxe
Shared: Casual · Puzzle · Singleplayer

Slime Rancher 2
Shared: Singleplayer · Colorful · Casual

A Little to the Left
Shared: Puzzle · Casual · Singleplayer

Mirror 2: Project X
Shared: 3D · Singleplayer · Casual

Sizeable
Shared: Casual · Puzzle · 3D

BALAN WONDERWORLD
Shared: Casual · Puzzle · 3D

Donut County
Shared: Casual · Puzzle · Singleplayer

Strange Jigsaws
Shared: Casual · Puzzle · Colorful

Quantum Conundrum
Shared: Puzzle · Puzzle Platformer · Casual

Monument Valley 3
Shared: Casual · Colorful · Puzzle

The Last Campfire
Shared: Puzzle · Singleplayer · Puzzle Platformer

Scribblenauts Unlimited
Shared: Casual · Puzzle · Singleplayer

PowerWash Simulator
Shared: Casual · 3D · Colorful

Viewfinder
Shared: Puzzle · Puzzle Platformer · Singleplayer

