Games like Who is Abby
Games like Who is Abby include The Exit 8, Maize, The House of Da Vinci, The Room 4: Old Sins, and Platform 8. We matched them by the tags players give Who is Abby on Steam (Exploration, Immersive Sim, Collectathon, Hidden Object, and Puzzle): closest matches first, and among equally close ones the better-known games.

The Exit 8
Shared: Exploration · Immersive Sim · Puzzle

Maize
Shared: Exploration · Collectathon · Hidden Object

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

The Room 4: Old Sins
Shared: Puzzle · Point & Click · Hidden Object

Platform 8
Shared: Exploration · Puzzle · Hidden Object

Supraworld
Shared: Exploration · Immersive Sim · Puzzle

Big Walk
Shared: Exploration · Puzzle · Immersive Sim

Botany Manor
Shared: Exploration · Immersive Sim · Puzzle

The Room
Shared: Puzzle · Point & Click · Hidden Object

Librarian: Tidy Up the Arcane Library!
Shared: Collectathon · Puzzle · Hidden Object

The House of Da Vinci 3
Shared: Hidden Object · Exploration · Puzzle

Riven
Shared: Exploration · Puzzle · First-Person

Firewatch
Shared: Exploration · Walking Simulator · First-Person

The Witness
Shared: Exploration · Puzzle · First-Person

INFRA
Shared: Exploration · Puzzle · Walking Simulator

The House of Tesla: Definitive Edition
Shared: Hidden Object · Exploration · Point & Click

What Remains of Edith Finch
Shared: Exploration · Walking Simulator · First-Person

Tangle Tower
Shared: Exploration · Puzzle · Point & Click

The Talos Principle 2
Shared: Puzzle · Exploration · First-Person

Myst
Shared: Exploration · Puzzle · First-Person

Agent A: A puzzle in disguise
Shared: Exploration · Puzzle · Point & Click

Discolored
Shared: Exploration · Puzzle · Point & Click

The Stanley Parable
Shared: Walking Simulator · First-Person · Exploration

Obduction
Shared: Exploration · Puzzle · First-Person