Games like Idle: Multipliers
Games like Idle: Multipliers include Cookie Clicker, Nodebuster, Digseum, Shelldiver, and Scritchy Scratchy. We matched them by the tags players give Idle: Multipliers on Steam (Idler, Incremental, Management, Sandbox, and Simulation): closest matches first, and among equally close ones the better-known games.

Cookie Clicker
Shared: Idler · Incremental · Management

Nodebuster
Shared: Incremental · Idler · Simulation

Digseum
Shared: Incremental · Idler · Management

Shelldiver
Shared: Incremental · Management · Idler

Scritchy Scratchy
Shared: Incremental · Idler · Management

Planet Coaster
Shared: Management · Simulation · Sandbox

Loot Loop
Shared: Incremental · Idler · Management

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

Bills Must Be Paid
Shared: Incremental · Idler · Relaxing

Mini Motorways
Shared: Management · Simulation · Strategy

Tiny Pasture
Shared: Idler · Incremental · Management

Potion Craft: Alchemist Simulator
Shared: Simulation · Management · Relaxing

Cities: Skylines
Shared: Management · Simulation · Sandbox

Cities: Skylines II
Shared: Simulation · Sandbox · Management

Fortune Mill
Shared: Idler · Incremental · Simulation

Foundation
Shared: Simulation · Sandbox · Management

Dragon Cliff
Shared: Idler · Incremental · Management

Stardew Valley
Shared: Simulation · Relaxing · Sandbox

A Game About Feeding A Black Hole
Shared: Incremental · Idler · Relaxing

911 Operator
Shared: Management · Simulation · Strategy

Rusty's Retirement
Shared: Idler · Management · Simulation

Graveyard Keeper
Shared: Management · Simulation · Sandbox

Game Dev Tycoon
Shared: Management · Simulation · Strategy

Lyca
Shared: Incremental · Idler · Management