Games like Slime Kingdom: Idle
Games like Slime Kingdom: Idle include Cookie Clicker, Shelldiver, Keep on Mining!, A Game About Feeding A Black Hole, and Digseum. We matched them by the tags players give Slime Kingdom: Idle on Steam (Casual, Incremental, Idler, 2D, and Singleplayer): closest matches first, and among equally close ones the better-known games.

Cookie Clicker
Shared: Incremental · Idler · Casual

Shelldiver
Shared: Casual · Incremental · Idler

Keep on Mining!
Shared: Incremental · Casual · Idler

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

Digseum
Shared: Casual · Incremental · Idler

Nodebuster
Shared: Casual · Incremental · Idler

Timber Rush
Shared: Casual · Idler · Incremental

Click the Button
Shared: Casual · Incremental · Idler

Idle Champions of the Forgotten Realms
Shared: Idler · Incremental · Singleplayer

Fortune Mill
Shared: Incremental · Idler · Casual

DAVE THE DIVER
Shared: Casual · Singleplayer · Relaxing

Potion Craft: Alchemist Simulator
Shared: Singleplayer · Relaxing · 2D

Chef Knight
Shared: Incremental · Casual · Idler

Keep on Mining! - Worlds
Shared: Casual · Incremental · Idler

Tower Wizard
Shared: Incremental · Idler · 2D

Human-powered spacecraft
Shared: Casual · Incremental · Idler

Tiny Pasture
Shared: Idler · Incremental · Casual

Bills Must Be Paid
Shared: Incremental · Idler · Casual

Click and Conquer
Shared: Casual · Incremental · Idler

Loot Loop
Shared: Casual · Incremental · Idler

Melvor Idle
Shared: Casual · Idler · Singleplayer

How to Train Your Cock
Shared: Casual · Idler · Incremental

Scritchy Scratchy
Shared: Incremental · Idler · Resource Management

Incredicer
Shared: Incremental · Casual · Idler