Games like Specter
Games like Specter include ANIMAL WELL, FEZ, Webbed, OneShot, and Rain World. We matched them by the tags players give Specter on Steam (2D Platformer, Casual, Exploration, Atmospheric, and Puzzle Platformer): closest matches first, and among equally close ones the better-known games.

ANIMAL WELL
Shared: Exploration · Puzzle Platformer · Pixel Graphics

FEZ
Shared: Exploration · Puzzle · Pixel Graphics

Webbed
Shared: 2D Platformer · Exploration · Puzzle Platformer

OneShot
Shared: Pixel Graphics · Atmospheric · Puzzle

Rain World
Shared: Atmospheric · Exploration · Pixel Graphics

Öoo
Shared: 2D Platformer · Puzzle Platformer · Exploration

Spirit of the North
Shared: Atmospheric · Exploration · Casual

Outer Wilds
Shared: Exploration · Adventure · Atmospheric

Stray
Shared: Atmospheric · Adventure · Exploration

Planet of Lana
Shared: 2D Platformer · Puzzle Platformer · Atmospheric

DAVE THE DIVER
Shared: Casual · Pixel Graphics · Exploration

LIMBO
Shared: Puzzle Platformer · Atmospheric · Puzzle

INMOST
Shared: Exploration · Pixel Graphics · Adventure

Celeste
Shared: 2D Platformer · Pixel Graphics · Adventure

FAR: Lone Sails
Shared: Atmospheric · Exploration · Adventure

Hogwarts Legacy
Shared: Adventure · Exploration · Fantasy

Whisper of the House
Shared: Casual · Pixel Graphics · Atmospheric

Trine Enchanted Edition
Shared: 2D Platformer · Puzzle Platformer · Fantasy

COCOON
Shared: Exploration · Adventure · Puzzle Platformer

Braid
Shared: 2D Platformer · Puzzle Platformer · Puzzle

INSIDE
Shared: Atmospheric · Puzzle Platformer · Adventure

Trine 2: Complete Story
Shared: 2D Platformer · Puzzle Platformer · Puzzle

Firewatch
Shared: Atmospheric · Adventure · Exploration

Leap Year
Shared: 2D Platformer · Exploration · Puzzle Platformer