Games like Sheep Island
Games like Sheep Island include Stardew Valley, Potion Craft: Alchemist Simulator, DAVE THE DIVER, Graveyard Keeper, and Forager. We matched them by the tags players give Sheep Island on Steam (Casual, Simulation, Farming Sim, Crafting, and Resource Management): closest matches first, and among equally close ones the better-known games.

Stardew Valley
Shared: Farming Sim · Simulation · Pixel Graphics

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

DAVE THE DIVER
Shared: Casual · Pixel Graphics · Management

Graveyard Keeper
Shared: Simulation · Crafting · Pixel Graphics

Forager
Shared: Crafting · Farming Sim · Pixel Graphics

Factorio
Shared: Resource Management · Crafting · Casual

Game Dev Tycoon
Shared: Simulation · Casual · Management

My Time at Portia
Shared: Farming Sim · Simulation · Casual

Tiny Pasture
Shared: Farming Sim · Casual · Pixel Graphics

Shelldiver
Shared: Casual · Resource Management · Simulation

Cookie Clicker
Shared: Casual · Pixel Graphics · Indie

Travellers Rest
Shared: Farming Sim · Pixel Graphics · Crafting

Forage Wizard
Shared: Casual · Simulation · Crafting

Your Big, Cute Monster Farm
Shared: Casual · Simulation · Farming Sim

Click Mage
Shared: Simulation · Casual · Resource Management

Clanfolk
Shared: Farming Sim · Simulation · Pixel Graphics

Megaquarium
Shared: Casual · Simulation · Creature Collector

I Am Future: Cozy Apocalypse Survival
Shared: Casual · Farming Sim · Simulation

Coral Island
Shared: Farming Sim · Simulation · Crafting

Fields of Mistria
Shared: Farming Sim · Simulation · Pixel Graphics

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

Sun Haven
Shared: Farming Sim · Pixel Graphics · Simulation

Farm Manager 2018
Shared: Farming Sim · Casual · Resource Management

Cities: Skylines
Shared: Simulation · Management · Resource Management