Games like The Funnel
Games like The Funnel include Breakout 13, Pentiment, Outer Wilds, FAR: Lone Sails, and Sable. We matched them by the tags players give The Funnel on Steam (Choose Your Own Adventure, Exploration, Puzzle, Interactive Fiction, and 2.5D): closest matches first, and among equally close ones the better-known games.

Breakout 13
Shared: Choose Your Own Adventure · Exploration · Interactive Fiction

Pentiment
Shared: Interactive Fiction · Adventure · Exploration

Outer Wilds
Shared: Exploration · Adventure · Puzzle

FAR: Lone Sails
Shared: Exploration · Adventure · 2.5D

Sable
Shared: Exploration · Choose Your Own Adventure · Adventure

Until Dawn™
Shared: Choose Your Own Adventure · Choices Matter · Adventure

Late Shift
Shared: Choose Your Own Adventure · Interactive Fiction · Choices Matter

Blue Prince
Shared: Puzzle · Exploration · Adventure

WILL: A Wonderful World / WILL:美好世界
Shared: Puzzle · Exploration · Adventure

OneShot
Shared: Puzzle · Story Rich · Adventure

Road 96
Shared: Choose Your Own Adventure · Adventure · Choices Matter

Death and Taxes
Shared: Choices Matter · Choose Your Own Adventure · Puzzle

Her Story
Shared: Choose Your Own Adventure · Interactive Fiction · Puzzle

80 Days
Shared: Choose Your Own Adventure · Adventure · Interactive Fiction

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

The Wolf Among Us
Shared: Choose Your Own Adventure · Adventure · Story Rich

Word Game
Shared: Exploration · Choose Your Own Adventure · Puzzle

The Forgotten City
Shared: Exploration · Adventure · Choices Matter

The Test
Shared: Choose Your Own Adventure · Multiple Endings · Story Rich

The Casting of Frank Stone™
Shared: Choices Matter · Multiple Endings · Adventure

Suzerain
Shared: Choose Your Own Adventure · Interactive Fiction · Choices Matter

INSIDE
Shared: 2.5D · Adventure · Story Rich

Killer Frequency
Shared: Puzzle · Interactive Fiction · Adventure

Chants of Sennaar
Shared: Puzzle · Adventure · Exploration