Games like Idle Colony
Games like Idle Colony include Cookie Clicker, (the) Gnorp Apologue, Shelldiver, Nodebuster, and Banana. We matched them by the tags players give Idle Colony on Steam (Incremental, Casual, Automation, Strategy, and Idler): closest matches first, and among equally close ones the better-known games.

Cookie Clicker
Shared: Incremental · Casual · Idler

(the) Gnorp Apologue
Shared: Incremental · Strategy · Idler

Shelldiver
Shared: Incremental · Casual · Idler

Nodebuster
Shared: Incremental · Casual · Strategy

Banana
Shared: Incremental · Casual · Idler

Bills Must Be Paid
Shared: Incremental · Strategy · Casual

Kiwi Clicker - Juiced Up
Shared: Incremental · Casual · Idler

Game Dev Tycoon
Shared: Casual · Strategy · Management

Incredicer
Shared: Incremental · Casual · Idler

Gamblers Table
Shared: Incremental · Automation · Management

Rusty's Retirement
Shared: Automation · Idler · Management

Digseum
Shared: Incremental · Casual · Idler

Fortune Mill
Shared: Incremental · Automation · Idler

Cities: Skylines
Shared: Strategy · Management · Building

Tower Wizard
Shared: Incremental · Idler · Strategy

Scritchy Scratchy
Shared: Incremental · Idler · Roguelite

Starvester
Shared: Incremental · Automation · Idler

Factory Town Idle
Shared: Incremental · Idler · Automation

Chef Knight
Shared: Incremental · Casual · Strategy

Captain of Industry
Shared: Automation · Strategy · Economy

Factorio
Shared: Automation · Strategy · Management

Keep on Mining!
Shared: Incremental · Casual · Idler

Prison Architect
Shared: Strategy · Building · Colony Sim

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