Games like Equilinox
Games like Equilinox include Mountain, Planet Coaster, House Flipper, Potion Craft: Alchemist Simulator, and Game Dev Tycoon. We matched them by the tags players give Equilinox on Steam (Simulation, Indie, Casual, Relaxing, and Sandbox): closest matches first, and among equally close ones the better-known games.

Mountain
Shared: Simulation · Indie · Casual

Planet Coaster
Shared: Simulation · Sandbox · Relaxing

House Flipper
Shared: Simulation · Singleplayer · Relaxing

Potion Craft: Alchemist Simulator
Shared: Simulation · Relaxing · Singleplayer

Game Dev Tycoon
Shared: Simulation · Indie · Casual

Reus
Shared: Indie · Simulation · God Game

Townscaper
Shared: Relaxing · Sandbox · Casual

Slime Rancher 2
Shared: Relaxing · Singleplayer · Simulation

PowerWash Simulator
Shared: Casual · Simulation · Relaxing

Mini Motorways
Shared: Simulation · Casual · Indie

Passpartout: The Starving Artist
Shared: Simulation · Casual · Indie

ABZU
Shared: Relaxing · Casual · Singleplayer

Planet Zoo
Shared: Simulation · Sandbox · Nature

Slime Rancher
Shared: Singleplayer · Simulation · Sandbox

Assemble with Care
Shared: Indie · Casual · Relaxing

Totally Accurate Battle Simulator
Shared: Simulation · Sandbox · Indie

Tiny Glade
Shared: Relaxing · Sandbox · Casual

Stardew Valley
Shared: Simulation · Relaxing · Sandbox

Everything
Shared: Simulation · Casual · Indie

Unpacking
Shared: Relaxing · Casual · Simulation

Cities: Skylines II
Shared: Simulation · Sandbox · Singleplayer

My Dream Setup
Shared: Simulation · Relaxing · Casual

SUMMERHOUSE
Shared: Relaxing · Sandbox · Casual

Sticky Business
Shared: Simulation · Casual · Relaxing

