Games like B.I.G
Games like B.I.G include Sonic Frontiers, The Artisan of Glimmith, Chants of Sennaar, Monument Valley, and Stray. We matched them by the tags players give B.I.G on Steam (Adventure, Strategy, Puzzle, 3D Platformer, and Exploration): closest matches first, and among equally close ones the better-known games.

Sonic Frontiers
Shared: Adventure · 3D Platformer · Exploration

The Artisan of Glimmith
Shared: Puzzle · Strategy · Adventure

Chants of Sennaar
Shared: Adventure · Puzzle · Colorful

Monument Valley
Shared: Adventure · Puzzle · Exploration

Stray
Shared: Adventure · Exploration · Puzzle

RiME
Shared: Adventure · Puzzle · Exploration

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

COCOON
Shared: Adventure · Puzzle · Exploration

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

The Room 4: Old Sins
Shared: Puzzle · Adventure · Hidden Object

A Hat in Time
Shared: 3D Platformer · Adventure · Exploration

Blue Prince
Shared: Puzzle · Exploration · Adventure

The Witness
Shared: Puzzle · Exploration · Adventure

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

Moncage
Shared: Puzzle · Adventure · Indie

Pumpkin Jack
Shared: Adventure · 3D Platformer · Colorful

Order of the Sinking Star
Shared: Adventure · Puzzle · Exploration

Yellow Taxi Goes Vroom
Shared: 3D Platformer · Exploration · Colorful

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

Outer Wilds
Shared: Adventure · Exploration · Puzzle

Pseudoregalia
Shared: 3D Platformer · Exploration · 3D

Spirit of the North
Shared: Adventure · Puzzle · Exploration

Supraland
Shared: Adventure · Exploration · Puzzle

Pizza Possum
Shared: Adventure · Strategy · Exploration