Games like Two World Portal
Games like Two World Portal include The Room, The Room Three, The Room 4: Old Sins, The Room Two, and Outer Wilds. We matched them by the tags players give Two World Portal on Steam (Adventure, Puzzle, Hidden Object, Third Person, and Mystery): closest matches first, and among equally close ones the better-known games.

The Room
Shared: Puzzle · Mystery · Adventure

The Room Three
Shared: Puzzle · Adventure · Mystery

The Room 4: Old Sins
Shared: Puzzle · Adventure · Mystery

The Room Two
Shared: Puzzle · Mystery · Hidden Object

Outer Wilds
Shared: Adventure · Mystery · Story Rich

Tomb Raider Game of the Year
Shared: Adventure · Third Person · Story Rich

Return of the Obra Dinn
Shared: Puzzle · Mystery · Story Rich

The House of Da Vinci
Shared: Puzzle · Hidden Object · Mystery

Sherlock Holmes: The Devil's Daughter
Shared: Adventure · Puzzle · Mystery

Rise of the Tomb Raider™
Shared: Adventure · Third Person · Singleplayer

Twelve Minutes
Shared: Adventure · Puzzle · Mystery

UNCHARTED™: Legacy of Thieves Collection
Shared: Adventure · Story Rich · Puzzle

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

Murders on the Yangtze River
Shared: Puzzle · Adventure · Story Rich

Chants of Sennaar
Shared: Adventure · Puzzle · Singleplayer

Blue Prince
Shared: Puzzle · Mystery · Adventure

Firewatch
Shared: Adventure · Story Rich · Mystery

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

Stray
Shared: Adventure · Singleplayer · Puzzle

Little Nightmares
Shared: Adventure · Puzzle · Singleplayer

Syberia 3
Shared: Adventure · Puzzle · Story Rich

Rusty Lake Paradise
Shared: Puzzle · Adventure · Indie

Boxes: Lost Fragments
Shared: Puzzle · Adventure · Mystery

What Remains of Edith Finch
Shared: Story Rich · Adventure · Mystery