Games like Decofarm
Games like Decofarm include Planet Coaster, Townscaper, Bunny Park, Farm Together, and Slime Rancher 2. We matched them by the tags players give Decofarm on Steam (Simulation, Cute, Incremental, Sandbox, and Building): closest matches first, and among equally close ones the better-known games.

Planet Coaster
Shared: Simulation · Building · Sandbox

Townscaper
Shared: Sandbox · Building · Relaxing

Bunny Park
Shared: Simulation · Cute · Incremental

Farm Together
Shared: Simulation · Agriculture · Relaxing

Slime Rancher 2
Shared: Cute · Relaxing · Simulation

Tiny Glade
Shared: Building · Sandbox · Cute

Stardew Valley
Shared: Simulation · Relaxing · Sandbox

The Sims™ 4
Shared: Simulation · Building · Sandbox

Two Point Museum
Shared: Simulation · Building · Casual

House Flipper
Shared: Simulation · Building · Sandbox

Planet Zoo
Shared: Simulation · Sandbox · Building

Cities: Skylines
Shared: Simulation · Building · Sandbox

Slime Rancher
Shared: Cute · Simulation · Sandbox

Cities: Skylines II
Shared: Simulation · Sandbox · Building

My Dream Setup
Shared: Simulation · Building · Sandbox

Hozy
Shared: Sandbox · Cute · Relaxing

Gourdlets
Shared: Simulation · Sandbox · Cute

Garry's Mod
Shared: Sandbox · Building · Casual

PowerWash Simulator
Shared: Simulation · Casual · Relaxing

Megaquarium
Shared: Simulation · Sandbox · Building

Two Point Hospital
Shared: Simulation · Building · Sandbox

SUMMERHOUSE
Shared: Sandbox · Relaxing · Casual

Paralives
Shared: Simulation · Building · Sandbox

PC Building Simulator
Shared: Simulation · Building · Sandbox