Games like atomica
Games like atomica include Refunct, Sonic Frontiers, Pseudoregalia, Grow Home, and A Short Hike. We matched them by the tags players give atomica on Steam (Exploration, 3D Platformer, Education, Parkour, and Platformer): closest matches first, and among equally close ones the better-known games.

Refunct
Shared: 3D Platformer · Parkour · Platformer

Sonic Frontiers
Shared: 3D Platformer · Exploration · Adventure

Pseudoregalia
Shared: 3D Platformer · Exploration · Parkour

Grow Home
Shared: Exploration · 3D Platformer · Adventure

A Short Hike
Shared: Exploration · Adventure · Relaxing

Valley
Shared: Exploration · Parkour · Adventure

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

Submerged
Shared: Exploration · Walking Simulator · Relaxing

Chained Together
Shared: Platformer · 3D Platformer · Adventure

The Big Catch: Tacklebox
Shared: 3D Platformer · Exploration · Platformer

ABZU
Shared: Exploration · Relaxing · Adventure

AER Memories of Old
Shared: Exploration · Adventure · Relaxing

Exo One
Shared: Exploration · 3D Platformer · Walking Simulator

Firewatch
Shared: Exploration · Walking Simulator · Adventure

Prince of Persia®
Shared: Parkour · Platformer · Exploration

Spirit of the North
Shared: Exploration · Adventure · 3D Platformer

Cairn
Shared: Exploration · Adventure · Parkour

A Story About My Uncle
Shared: Parkour · Adventure · 3D Platformer

BABBDI
Shared: Exploration · Walking Simulator · 3D Platformer

Mirror's Edge™
Shared: Exploration · Parkour · 3D Platformer

Rooftops & Alleys: The Parkour Game
Shared: 3D Platformer · Parkour · Exploration

Journey
Shared: Exploration · Adventure · Walking Simulator

Grow Up
Shared: Exploration · 3D Platformer · Adventure

RiME
Shared: Exploration · Adventure · 3D Platformer