Games like Watch Your Plastic Duck
Games like Watch Your Plastic Duck include Cookie Clicker, Unpacking, Placid Plastic Duck Simulator, Stardew Valley, and Sticky Business. We matched them by the tags players give Watch Your Plastic Duck on Steam (Casual, Simulation, Idler, Immersive Sim, and 2D): closest matches first, and among equally close ones the better-known games.

Cookie Clicker
Shared: Idler · Casual · Pixel Graphics

Unpacking
Shared: Casual · Cute · Relaxing

Placid Plastic Duck Simulator
Shared: Casual · Cute · Immersive Sim

Stardew Valley
Shared: Simulation · Pixel Graphics · Relaxing

Sticky Business
Shared: Casual · Simulation · Cute

Shelldiver
Shared: Casual · Idler · Simulation

Maltese's Fluffy Onsen
Shared: Simulation · Casual · Pixel Graphics

Click the Button
Shared: Casual · Idler · Simulation

DAVE THE DIVER
Shared: Casual · Pixel Graphics · Relaxing

PowerWash Simulator
Shared: Casual · Simulation · Relaxing

House Flipper
Shared: Simulation · Casual · Singleplayer

MyVoiceZoo
Shared: Casual · Simulation · Idler

Slime Rancher 2
Shared: Cute · Singleplayer · Simulation

Tiny Pasture
Shared: Idler · Casual · Cute

Slime Rancher
Shared: Cute · Singleplayer · Simulation

Digseum
Shared: Casual · Idler · Simulation

People Playground
Shared: 2D · Simulation · Sandbox

Townscaper
Shared: Casual · Simulation · Relaxing

Screen Cat
Shared: Casual · Cute · Idler

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

My Dream Setup
Shared: Simulation · Casual · Relaxing

Chill with You : Lo-Fi Story
Shared: Casual · Relaxing · Immersive Sim

Nodebuster
Shared: Casual · Idler · Simulation

SUMMERHOUSE
Shared: Casual · Singleplayer · Relaxing