Games like Rat Overflow
Games like Rat Overflow include Stardew Valley, Tiny Pasture, Horsey Game, Two Point Museum, and MyVoiceZoo. We matched them by the tags players give Rat Overflow on Steam (Simulation, Creature Collector, Casual, Cute, and Life Sim): closest matches first, and among equally close ones the better-known games.

Stardew Valley
Shared: Simulation · Life Sim · Pixel Graphics

Tiny Pasture
Shared: Cute · Casual · Creature Collector

Horsey Game
Shared: Simulation · Creature Collector · Life Sim

Two Point Museum
Shared: Simulation · Casual · Sandbox

MyVoiceZoo
Shared: Simulation · Casual · Creature Collector

Megaquarium
Shared: Simulation · Casual · Creature Collector

The Sims™ 4
Shared: Simulation · Life Sim · Sandbox

Little Witch in the Woods
Shared: Cute · Simulation · Casual

Maltese's Fluffy Onsen
Shared: Simulation · Cute · Casual

Game Dev Tycoon
Shared: Simulation · Casual · Management

Minami Lane
Shared: Casual · Cute · Simulation

Moonstone Island
Shared: Creature Collector · Cute · 2D

Unpacking
Shared: Casual · Cute · Simulation

Shelldiver
Shared: Casual · Simulation · Management

Planet Zoo
Shared: Simulation · Sandbox · Management

PC Building Simulator
Shared: Simulation · Sandbox · Management

Let's Build a Zoo
Shared: Simulation · Creature Collector · Sandbox

Cookie Clicker
Shared: Casual · Idler · Management

Cornerpond
Shared: Simulation · Creature Collector · Casual

SPORE™
Shared: Simulation · Sandbox · Casual

Digseum
Shared: Casual · Simulation · Management

DAVE THE DIVER
Shared: Casual · Management · Pixel Graphics

WorldBox - God Simulator
Shared: Simulation · Sandbox · Life Sim

Supermarket Simulator
Shared: Simulation · Management · Life Sim