Games like Duplexer
Games like Duplexer include Portal, LIMBO, Portal 2, Viewfinder, and Antichamber. We matched them by the tags players give Duplexer on Steam (Indie, Puzzle Platformer, First-Person, and Puzzle): closest matches first, and among equally close ones the better-known games.
Portal
Shared: Puzzle Platformer · Puzzle · First-Person
LIMBO
Shared: Indie · Puzzle Platformer · Puzzle
Portal 2
Shared: First-Person · Puzzle · Puzzle Platformer
Viewfinder
Shared: Puzzle Platformer · First-Person · Puzzle
Antichamber
Shared: Indie · First-Person · Puzzle
Supraland
Shared: Puzzle Platformer · First-Person · Puzzle
Manifold Garden
Shared: Puzzle · First-Person · Puzzle Platformer
Braid
Shared: Puzzle Platformer · Indie · Puzzle
Poppy Playtime
Shared: Puzzle · First-Person · Indie
The Witness
Shared: Puzzle · First-Person · Indie
Defy Gravity Extended
Shared: Puzzle Platformer · Indie · Puzzle
The Unfinished Swan
Shared: Indie · Puzzle · Puzzle Platformer
Murders on the Yangtze River
Shared: Puzzle · Indie · Puzzle Platformer
Bendy and the Ink Machine
Shared: First-Person · Puzzle · Indie
INSIDE
Shared: Puzzle Platformer · Indie · Puzzle
Human Fall Flat
Shared: Puzzle · Puzzle Platformer · Indie
The Talos Principle 2
Shared: Puzzle · First-Person · Puzzle Platformer
NaissanceE
Shared: Indie · First-Person · Puzzle
Little Nightmares
Shared: Puzzle Platformer · Indie · Puzzle
COCOON
Shared: Indie · Puzzle · Puzzle Platformer
The Talos Principle
Shared: Puzzle · First-Person · Indie
Polarity
Shared: Indie · First-Person · Puzzle
Maquette
Shared: Indie · First-Person · Puzzle
The Ball
Shared: Puzzle Platformer · First-Person · Puzzle