Games like Growmon Island
Games like Growmon Island include Spirit City: Lofi Sessions, Tiny Pasture, Slime Rancher 2, House Flipper, and Fish to Dish: Idle Sushi. We matched them by the tags players give Growmon Island on Steam (Creature Collector, Desktop Companion, Collectathon, Casual, and Idler): closest matches first, and among equally close ones the better-known games.
Spirit City: Lofi Sessions
Shared: Desktop Companion · Creature Collector · Decorating
Tiny Pasture
Shared: Idler · Creature Collector · Casual
Slime Rancher 2
Shared: Creature Collector · Singleplayer · Relaxing
House Flipper
Shared: Singleplayer · Simulation · Casual
Fish to Dish: Idle Sushi
Shared: Desktop Companion · Creature Collector · Idler
Cornerpond
Shared: Desktop Companion · Idler · Creature Collector
Ropuka's Idle Island
Shared: Desktop Companion · Idler · Casual
WEBFISHING
Shared: Casual · Creature Collector · Collectathon
Birdwatching Notebook
Shared: Creature Collector · Desktop Companion · Idler
Cookie Clicker
Shared: Idler · Casual · Collectathon
Placid Plastic Duck Simulator
Shared: Collectathon · Casual · Relaxing
Librarian: Tidy Up the Arcane Library!
Shared: Collectathon · Casual · Singleplayer
My Little Life
Shared: Desktop Companion · Idler · Creature Collector
Rusty's Retirement
Shared: Desktop Companion · Idler · Simulation
MyVoiceZoo
Shared: Creature Collector · Casual · Idler
Chillquarium
Shared: Creature Collector · Collectathon · Idler
Megaquarium
Shared: Casual · Creature Collector · Simulation
Maltese's Fluffy Onsen
Shared: Desktop Companion · Casual · Idler
Tiny Aquarium: Social Fishkeeping
Shared: Creature Collector · Collectathon · Idler
TCG Card Shop Simulator
Shared: Collectathon · Simulation · Singleplayer
Cast n Chill
Shared: Creature Collector · Idler · Desktop Companion
Mushroom Nook
Shared: Desktop Companion · Creature Collector · Idler
Sticky Business
Shared: Casual · Simulation · Decorating
House Flipper 2
Shared: Casual · Decorating · Relaxing