Games like Arboreal
Games like Arboreal include Stardew Valley, Timberborn, Kingdoms and Castles, Planet Zoo, and Autonauts. We matched them by the tags players give Arboreal on Steam (Simulation, Cooking, Colony Sim, Nature, and Farming Sim): closest matches first, and among equally close ones the better-known games.

Stardew Valley
Shared: Farming Sim · Simulation · Sandbox

Timberborn
Shared: Colony Sim · Sandbox · Nature

Kingdoms and Castles
Shared: Colony Sim · Simulation · Resource Management

Planet Zoo
Shared: Simulation · Nature · Sandbox

Autonauts
Shared: Simulation · Automation · Colony Sim

Rusty's Retirement
Shared: Farming Sim · Simulation · Automation

Prison Architect
Shared: Simulation · Colony Sim · Sandbox

The Wandering Village
Shared: Simulation · Colony Sim · Management

Oxygen Not Included
Shared: Colony Sim · Resource Management · Simulation

Factorio
Shared: Automation · Sandbox · Resource Management

Banished
Shared: Colony Sim · Simulation · Sandbox

Planet Coaster
Shared: Simulation · Sandbox · Management

Cities: Skylines
Shared: Simulation · Sandbox · Management

Potion Craft: Alchemist Simulator
Shared: Simulation · Management · Sandbox

Foundation
Shared: Simulation · Sandbox · Resource Management

RimWorld
Shared: Colony Sim · Simulation · Sandbox

Flotsam
Shared: Colony Sim · Sandbox · Automation

Dwarf Fortress
Shared: Colony Sim · Simulation · Sandbox

Plan B: Terraform
Shared: Simulation · Colony Sim · Automation

Lemon Cake
Shared: Simulation · Farming Sim · Cooking

Two Point Museum
Shared: Simulation · Sandbox · Management

Dyson Sphere Program
Shared: Simulation · Automation · Resource Management

Cooking Simulator
Shared: Simulation · Cooking · Sandbox

SPORE™
Shared: Simulation · Colony Sim · Sandbox