Games like Microcosm
Games like Microcosm include Paralives, Startup Company, Mini Motorways, VRChat, and House Flipper. We matched them by the tags players give Microcosm on Steam (Indie, Simulation, Early Access, Casual, and Voxel): closest matches first, and among equally close ones the better-known games.

Paralives
Shared: Simulation · Indie · Building

Startup Company
Shared: Simulation · Indie · Casual

Mini Motorways
Shared: Simulation · Casual · Indie

VRChat
Shared: VR · Early Access · Simulation

House Flipper
Shared: Simulation · Building · Casual

Game Dev Tycoon
Shared: Simulation · Indie · Casual

Two Point Hospital
Shared: Simulation · Indie · Building

Plague Inc: Evolved
Shared: Simulation · Indie · Casual

Two Point Museum
Shared: Simulation · Casual · Building

Garry's Mod
Shared: Casual · Building · Simulation

Master Of Pottery
Shared: Simulation · Indie · Casual

Townsmen VR
Shared: Simulation · Indie · Casual

Mountain
Shared: Indie · Simulation · Casual

Tiny Town VR
Shared: Simulation · Indie · Casual

Stonehearth
Shared: Simulation · Building · Early Access

My Dream Setup
Shared: Simulation · Indie · Building

Automation - The Car Company Tycoon Game
Shared: Simulation · Building · Early Access

Stardew Valley
Shared: Simulation · Indie · Building

Contractors
Shared: Indie · VR · Simulation

Townscaper
Shared: Casual · Building · Simulation

Granny Simulator
Shared: Simulation · Indie · Casual

Train Station Renovation
Shared: Simulation · Indie · Casual

Hard Bullet
Shared: VR · Simulation · Indie

Retirement Simulator
Shared: Simulation · Indie · Casual