Games like Bad Granny Little Thief
Games like Bad Granny Little Thief include Portal 2, Poppy Playtime, Portal, Supraland, and The Room 4: Old Sins. We matched them by the tags players give Bad Granny Little Thief on Steam (Adventure, Puzzle, Puzzle Platformer, 3D, and Cartoony): closest matches first, and among equally close ones the better-known games.

Portal 2
Shared: Puzzle · First-Person · Puzzle Platformer

Poppy Playtime
Shared: Puzzle · First-Person · Singleplayer

Portal
Shared: Puzzle · Puzzle Platformer · First-Person

Supraland
Shared: Puzzle Platformer · Adventure · Puzzle

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

Bendy and the Ink Machine
Shared: Puzzle · First-Person · Cartoony

COCOON
Shared: Adventure · Puzzle · Puzzle Platformer

Viewfinder
Shared: Puzzle · Puzzle Platformer · First-Person

Garten of Banban
Shared: Puzzle · First-Person · Cartoony

Blue Prince
Shared: Puzzle · Mystery · Adventure

Escape Simulator
Shared: Puzzle · Adventure · First-Person

The Room
Shared: Puzzle · Adventure · Mystery

The Room Three
Shared: Puzzle · Adventure · Mystery

Quern - Undying Thoughts
Shared: Adventure · Puzzle · Mystery

Return of the Obra Dinn
Shared: Puzzle · Mystery · Adventure

Riven
Shared: Adventure · Puzzle · First-Person

Garten of Banban 2
Shared: Puzzle · First-Person · Cartoony

Outer Wilds
Shared: Adventure · Mystery · Puzzle

Myst
Shared: Adventure · Puzzle · First-Person

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

The Talos Principle
Shared: Puzzle · First-Person · Adventure

SchoolBoy Runaway
Shared: Adventure · Puzzle · 3D

Bendy and the Dark Revival
Shared: Adventure · First-Person · Singleplayer

Five Nights at Freddy's: Security Breach
Shared: First-Person · Adventure · Singleplayer