Games like Alien Cube
Games like Alien Cube include Portal 2, The Forest, Grand Theft Auto V Legacy, Human Fall Flat, and Poppy Playtime. We matched them by the tags players give Alien Cube on Steam (Adventure, Action, Puzzle, Puzzle Platformer, and First-Person): closest matches first, and among equally close ones the better-known games.

Portal 2
Shared: Puzzle · First-Person · Singleplayer

The Forest
Shared: Adventure · Survival · Action

Grand Theft Auto V Legacy
Shared: Action · Adventure · First-Person

Human Fall Flat
Shared: Puzzle · Adventure · Puzzle Platformer

Poppy Playtime
Shared: Puzzle · First-Person · Singleplayer

Left 4 Dead 2
Shared: Action · Survival · Co-op

Portal
Shared: Puzzle · Puzzle Platformer · First-Person

Sons Of The Forest
Shared: Survival · Adventure · Multiplayer

PUBG: BATTLEGROUNDS
Shared: Survival · Action · Multiplayer

Far Cry 3
Shared: Action · Adventure · First-Person

Little Nightmares II
Shared: Adventure · Puzzle · Horror

Far Cry® 4
Shared: Action · Adventure · First-Person

Half Dead
Shared: Adventure · Action · Survival

Outlast
Shared: First-Person · Horror · Adventure

ARK: Survival Evolved
Shared: Survival · Adventure · Action

Bendy and the Dark Revival
Shared: Action · Adventure · First-Person

Rise of the Tomb Raider™
Shared: Adventure · Action · Singleplayer

Subnautica 2
Shared: Survival · Adventure · Multiplayer

Rust
Shared: Survival · Adventure · Multiplayer

Grounded
Shared: Survival · Adventure · Multiplayer

Resident Evil 7 Biohazard
Shared: First-Person · Horror · Action

Paper Dolls: Original /
Shared: Adventure · Action · Puzzle

The Beast Inside
Shared: Adventure · First-Person · Action

Atomic Heart
Shared: Adventure · Action · Puzzle