Games like HA/CK
Games like HA/CK include Portal, Portal 2, Viewfinder, LIMBO, and The Talos Principle. We matched them by the tags players give HA/CK on Steam (Indie, Puzzle Platformer, First-Person, Puzzle, and 3D Platformer): closest matches first, and among equally close ones the better-known games.
Portal
Shared: Puzzle Platformer · Puzzle · First-Person
Portal 2
Shared: First-Person · Puzzle · Singleplayer
Viewfinder
Shared: Puzzle Platformer · First-Person · Puzzle
LIMBO
Shared: Indie · Puzzle Platformer · Puzzle
The Talos Principle
Shared: Puzzle · First-Person · Sci-fi
Supraland
Shared: Puzzle Platformer · First-Person · Puzzle
A Story About My Uncle
Shared: First-Person · Indie · Singleplayer
Little Nightmares
Shared: Puzzle Platformer · Indie · Puzzle
Black Mesa
Shared: First-Person · Sci-fi · Singleplayer
The Last Campfire
Shared: Puzzle · Indie · Singleplayer
Poppy Playtime
Shared: Puzzle · First-Person · Singleplayer
Return of the Obra Dinn
Shared: Puzzle · Indie · First-Person
Antichamber
Shared: Indie · First-Person · Puzzle
The Ball
Shared: Puzzle Platformer · First-Person · 3D Platformer
INSIDE
Shared: Puzzle Platformer · Indie · Atmospheric
Polarity
Shared: Indie · First-Person · Puzzle
The Witness
Shared: Puzzle · First-Person · Indie
Firework
Shared: Indie · Puzzle · Singleplayer
SUPERHOT
Shared: Indie · First-Person · Singleplayer
Half-Life 2
Shared: First-Person · Sci-fi · Singleplayer
Defy Gravity Extended
Shared: Puzzle Platformer · Indie · Puzzle
The Talos Principle 2
Shared: Puzzle · First-Person · Puzzle Platformer
The Room
Shared: Puzzle · Indie · Singleplayer
COCOON
Shared: Indie · Puzzle · Puzzle Platformer