Games like Squirrel Idle Tycoon
Games like Squirrel Idle Tycoon include RimWorld, Banished, Bloons TD 6, Game Dev Tycoon, and Dota Underlords. We matched them by the tags players give Squirrel Idle Tycoon on Steam (Strategy, Idler, Casual, Auto Battler, and Colony Sim): closest matches first, and among equally close ones the better-known games.

RimWorld
Shared: Strategy · Colony Sim · Sandbox

Banished
Shared: Strategy · Colony Sim · Sandbox

Bloons TD 6
Shared: Strategy · Casual · Singleplayer

Game Dev Tycoon
Shared: Strategy · Casual · Indie

Dota Underlords
Shared: Strategy · Casual · Auto Battler

Cookie Clicker
Shared: Idler · Casual · Indie

Idle Champions of the Forgotten Realms
Shared: Idler · Strategy · Casual

Plague Inc: Evolved
Shared: Strategy · Casual · Indie

Castle Story
Shared: Strategy · Colony Sim · Sandbox

Banana
Shared: Casual · Idler · Singleplayer

The Scroll of Taiwu : Beyond The Dome
Shared: Strategy · Sandbox · Indie

Oxygen Not Included
Shared: Colony Sim · Strategy · Sandbox

Havendock
Shared: Strategy · Colony Sim · Sandbox

Dragon Cliff
Shared: Strategy · Idler · Casual

Totally Accurate Battle Simulator
Shared: Strategy · Sandbox · Singleplayer

Dawn of Man
Shared: Strategy · Colony Sim · Sandbox

Going Medieval
Shared: Strategy · Colony Sim · Sandbox

Keep on Mining!
Shared: Idler · Casual · Indie

Zero Stress King: Idle Defense
Shared: Idler · Strategy · Auto Battler

Plants vs. Zombies GOTY Edition
Shared: Strategy · Casual · Singleplayer

Reus
Shared: Strategy · Casual · Sandbox

TBH: Task Bar Hero
Shared: Idler · Casual · Indie

A Game About Feeding A Black Hole
Shared: Casual · Strategy · Idler

Ages of Conflict: World War Simulator
Shared: Sandbox · Idler · Strategy