Games like Windowsill Isle
Games like Windowsill Isle include Garden Galaxy, Tiny Glade, Spirit City: Lofi Sessions, Kind Words (lo fi chill beats to write to), and Cast n Chill. We matched them by the tags players give Windowsill Isle on Steam (Idler, Wholesome, Relaxing, Colony Sim, and Voxel): closest matches first, and among equally close ones the better-known games.

Garden Galaxy
Shared: Idler · Cozy · Relaxing

Tiny Glade
Shared: Relaxing · Cozy · Sandbox

Spirit City: Lofi Sessions
Shared: Relaxing · Cozy · Idler

Kind Words (lo fi chill beats to write to)
Shared: Relaxing · Wholesome · Cozy

Cast n Chill
Shared: Relaxing · Idler · Cozy

Station to Station
Shared: Relaxing · Voxel · Wholesome

TOEM: A Photo Adventure
Shared: Wholesome · Cozy · Relaxing

Creature Kitchen
Shared: Cozy · Relaxing · Nature

Is This Seat Taken?
Shared: Relaxing · Wholesome · Cozy

Timberborn
Shared: Colony Sim · Voxel · Sandbox

Terra Nil
Shared: Relaxing · Nature · Atmospheric

Chill with You : Lo-Fi Story
Shared: Relaxing · Idler · Atmospheric

My Dream Setup
Shared: Relaxing · Cozy · Sandbox

Town to City
Shared: Relaxing · Voxel · Cozy

Sticky Business
Shared: Relaxing · Wholesome · Cute

Spilled!
Shared: Relaxing · Wholesome · Cozy

Ropuka's Idle Island
Shared: Idler · Relaxing · Cozy

A Little to the Left
Shared: Relaxing · Wholesome · Cozy

Cloud Gardens
Shared: Relaxing · Nature · Atmospheric

LEGO® Builder's Journey
Shared: Relaxing · Cozy · Cute

Garden Life: A Cozy Simulator
Shared: Relaxing · Cozy · Sandbox

Banished
Shared: Colony Sim · Relaxing · Sandbox

Little Kitty, Big City
Shared: Wholesome · Cozy · Cute

Lil Gator Game
Shared: Relaxing · Wholesome · Cozy