Games like IDLE BOSS RUSH
Games like IDLE BOSS RUSH include Cookie Clicker, (the) Gnorp Apologue, Cities: Skylines, Tower Wizard, and Prison Architect. We matched them by the tags players give IDLE BOSS RUSH on Steam (Incremental, Idler, Building, Strategy, and Base Building): closest matches first, and among equally close ones the better-known games.

Cookie Clicker
Shared: Incremental · Idler · Casual

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

Cities: Skylines
Shared: Building · Strategy · City Builder

Tower Wizard
Shared: Incremental · Idler · Strategy

Prison Architect
Shared: Building · Base Building · Strategy

Hearth and Hamlet
Shared: Incremental · Base Building · Idler

Manor Lords
Shared: Strategy · Base Building · Building

Kingdoms and Castles
Shared: Strategy · Building · Resource Management

Against the Storm
Shared: Strategy · Building · Base Building

Oxygen Not Included
Shared: Base Building · Building · Resource Management

Shelldiver
Shared: Incremental · Idler · Casual

Frostpunk
Shared: Strategy · Building · Resource Management

Dragon Cliff
Shared: Idler · Strategy · Incremental

Factorio
Shared: Base Building · Strategy · Resource Management

Captain of Industry
Shared: Base Building · Strategy · Resource Management

Farthest Frontier
Shared: Building · Strategy · Resource Management

Workers & Resources: Soviet Republic
Shared: Strategy · Base Building · Building

Norland
Shared: Strategy · Base Building · Building

Nodebuster
Shared: Incremental · Idler · Strategy

Empires of the Undergrowth
Shared: Strategy · Base Building · Building

Cities: Skylines II
Shared: Building · Strategy · City Builder

Fill Up The Hole
Shared: Incremental · Idler · Building

Dyson Sphere Program
Shared: Building · Base Building · Resource Management

Foundation
Shared: Strategy · Building · Resource Management