Games like Microcosmum 2
Games like Microcosmum 2 include Microcosmum: survival of cells, ABZU, Planet Coaster, Carto, and Slime Rancher 2. We matched them by the tags players give Microcosmum 2 on Steam (RTS, Relaxing, Atmospheric, Idler, and Puzzle): closest matches first, and among equally close ones the better-known games.

Microcosmum: survival of cells
Shared: RTS · Atmospheric · Idler

ABZU
Shared: Relaxing · Atmospheric · Underwater

Planet Coaster
Shared: Relaxing · Sandbox · Strategy

Carto
Shared: Puzzle · Relaxing · Cute

Slime Rancher 2
Shared: Relaxing · Cute · Colorful

ISLANDERS
Shared: Relaxing · Puzzle · Strategy

GRIS
Shared: Atmospheric · Relaxing · Indie

Unpacking
Shared: Relaxing · Puzzle · Cute

Stray
Shared: Atmospheric · Puzzle · Cute

Townscaper
Shared: Relaxing · Sandbox · Atmospheric

OneShot
Shared: Atmospheric · Puzzle · Cute

Is This Seat Taken?
Shared: Relaxing · Puzzle · Cute

DAVE THE DIVER
Shared: Relaxing · Casual · Adventure

The Last Campfire
Shared: Puzzle · Atmospheric · Relaxing

Stardew Valley
Shared: Relaxing · Sandbox · RPG

Big Walk
Shared: Puzzle · Relaxing · Atmospheric

SUMMERHOUSE
Shared: Relaxing · Sandbox · Atmospheric

Shelldiver
Shared: Relaxing · Idler · Colorful

Chill with You : Lo-Fi Story
Shared: Relaxing · Atmospheric · Idler

Chants of Sennaar
Shared: Puzzle · Atmospheric · Colorful

The Witness
Shared: Puzzle · Atmospheric · Colorful

Zup! S
Shared: Puzzle · Relaxing · 2D

House Flipper
Shared: Relaxing · Sandbox · Simulation

Terra Nil
Shared: Relaxing · Puzzle · Atmospheric