Games like Mockingbird
Games like Mockingbird include Terraria, ANIMAL WELL, DAVE THE DIVER, FEZ, and OneShot. We matched them by the tags players give Mockingbird on Steam (Adventure, Puzzle, Exploration, 2D, and Pixel Graphics): closest matches first, and among equally close ones the better-known games.

Terraria
Shared: Adventure · 2D · Pixel Graphics

ANIMAL WELL
Shared: Puzzle · Exploration · Pixel Graphics

DAVE THE DIVER
Shared: Adventure · Pixel Graphics · Exploration

FEZ
Shared: Puzzle · Exploration · Pixel Graphics

OneShot
Shared: Pixel Graphics · Puzzle · Adventure

Five Nights at Freddy's: Into the Pit
Shared: Adventure · Pixel Graphics · 2D

Stray
Shared: Adventure · Exploration · Puzzle

The Rewinder
Shared: Adventure · Puzzle · Pixel Graphics

There Is No Game: Wrong Dimension
Shared: Puzzle · Adventure · Pixel Graphics

Rise of the Tomb Raider™
Shared: Adventure · Exploration · Singleplayer

Dead Cells
Shared: Adventure · Pixel Graphics · 2D

Outer Wilds
Shared: Exploration · Adventure · Puzzle

COCOON
Shared: Adventure · Puzzle · Exploration

Chants of Sennaar
Shared: Adventure · Puzzle · Singleplayer

Reventure
Shared: Adventure · Pixel Graphics · 2D

Tomb Raider Game of the Year
Shared: Adventure · Exploration · Singleplayer

Monument Valley
Shared: Puzzle · Adventure · Exploration

Out There Somewhere
Shared: Puzzle · Adventure · Pixel Graphics

Void Stranger
Shared: Puzzle · Adventure · 2D

Spirit of the North
Shared: Adventure · Exploration · Puzzle

Mad Father
Shared: 2D · Pixel Graphics · Exploration

FAR: Lone Sails
Shared: Adventure · Exploration · Puzzle

Outcore: Desktop Adventure
Shared: Adventure · Exploration · Puzzle

SANABI
Shared: Pixel Graphics · Adventure · 2D