Games like Zen Men
Games like Zen Men include Mountain, Reus, Potion Craft: Alchemist Simulator, Equilinox, and Game Dev Tycoon. We matched them by the tags players give Zen Men on Steam (Casual, Simulation, God Game, Sandbox, and Idler): closest matches first, and among equally close ones the better-known games.

Mountain
Shared: Simulation · Casual · God Game

Reus
Shared: God Game · Simulation · Casual

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

Equilinox
Shared: Simulation · Casual · Sandbox

Game Dev Tycoon
Shared: Simulation · Casual · Indie

House Flipper
Shared: Simulation · Casual · Sandbox

Stardew Valley
Shared: Simulation · Sandbox · Relaxing

People Playground
Shared: Sandbox · Simulation · 2D

Everything
Shared: Simulation · Casual · Sandbox

SPORE™
Shared: God Game · Sandbox · Simulation

WorldBox - God Simulator
Shared: Simulation · God Game · Sandbox

Solar 2
Shared: Casual · Sandbox · Simulation

MyVoiceZoo
Shared: Casual · Simulation · Sandbox

Townscaper
Shared: Casual · Sandbox · Simulation

Universe Sandbox
Shared: Simulation · Sandbox · God Game

Garry's Mod
Shared: Sandbox · Casual · Simulation

Sand:box
Shared: Simulation · Sandbox · God Game

PowerWash Simulator
Shared: Casual · Simulation · Sandbox

Ages of Conflict: World War Simulator
Shared: Simulation · God Game · Sandbox

Plague Inc: Evolved
Shared: Simulation · Casual · Indie

A Game About Feeding A Black Hole
Shared: Casual · Simulation · Idler

Cookie Clicker
Shared: Casual · Idler · Indie

Melvor Idle
Shared: Casual · Idler · 2D

Nodebuster
Shared: Casual · Simulation · Idler