Games like Cosmic Top Secret
Games like Cosmic Top Secret include Murders on the Yangtze River, Little Nightmares, INSIDE, The Last Campfire, and LIMBO. We matched them by the tags players give Cosmic Top Secret on Steam (Indie, Adventure, Story Rich, Puzzle, and Puzzle Platformer): closest matches first, and among equally close ones the better-known games.

Murders on the Yangtze River
Shared: Adventure · Puzzle · Indie

Little Nightmares
Shared: Adventure · Indie · Puzzle Platformer

INSIDE
Shared: Puzzle Platformer · Indie · Story Rich

The Last Campfire
Shared: Adventure · Puzzle · Indie

LIMBO
Shared: Indie · Puzzle Platformer · Puzzle

Brothers - A Tale of Two Sons
Shared: Adventure · Story Rich · Indie

Little Nightmares II
Shared: Adventure · Puzzle · Story Rich

OneShot
Shared: Indie · Story Rich · Puzzle

There Is No Game: Wrong Dimension
Shared: Indie · Adventure · Puzzle

Sally Face - Episode One
Shared: Indie · Story Rich · Adventure

Portal 2
Shared: Puzzle · Story Rich · Puzzle Platformer

Seen
Shared: Indie · Adventure · Puzzle

Chants of Sennaar
Shared: Adventure · Indie · Puzzle

FAR: Lone Sails
Shared: Adventure · Indie · Puzzle

Twelve Minutes
Shared: Indie · Adventure · Puzzle

Human Fall Flat
Shared: Puzzle · Adventure · Puzzle Platformer

Outer Wilds
Shared: Story Rich · Adventure · Puzzle

Fran Bow
Shared: Story Rich · Puzzle · Adventure

COCOON
Shared: Adventure · Indie · Puzzle

GRIS
Shared: Indie · Adventure · Story Rich

Servant of the Lake
Shared: Adventure · Puzzle · Indie

Never Alone (Kisima Ingitchuna)
Shared: Indie · Adventure · Story Rich

Nihilumbra
Shared: Indie · Adventure · Puzzle

Sanfu
Shared: Puzzle · Adventure · Story Rich