Games like Sludgineers
Games like Sludgineers include Shelldiver, Digseum, Keep on Mining!, Cookie Clicker, and Scritchy Scratchy. We matched them by the tags players give Sludgineers on Steam (Cozy, Incremental, Cleaning, Relaxing, and Mining): closest matches first, and among equally close ones the better-known games.

Shelldiver
Shared: Incremental · Resource Management · Relaxing

Digseum
Shared: Incremental · Relaxing · Management

Keep on Mining!
Shared: Incremental · Relaxing · Mining

Cookie Clicker
Shared: Incremental · Management · Casual

Scritchy Scratchy
Shared: Incremental · Resource Management · Relaxing

Leaf it Alone
Shared: Cleaning · Relaxing · Incremental

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

Click Mage
Shared: Incremental · Relaxing · Resource Management

Nodebuster
Shared: Incremental · Casual · Relaxing

Fortune Mill
Shared: Incremental · Resource Management · Economy

Fracture Field
Shared: Incremental · Mining · Resource Management

Keep on Mining! - Worlds
Shared: Incremental · Relaxing · Mining

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

Lyca
Shared: Incremental · Relaxing · Management

Click and Conquer
Shared: Incremental · Relaxing · Casual

Leafy Corner
Shared: Cozy · Relaxing · Management

House Flipper
Shared: Cleaning · Relaxing · Simulation

Ropuka's Idle Island
Shared: Cozy · Relaxing · Incremental

Hearth and Hamlet
Shared: Incremental · Relaxing · Management

Budgie's Bug Shop
Shared: Incremental · Management · Relaxing

DAVE THE DIVER
Shared: Relaxing · Management · Casual

Cast n Chill
Shared: Relaxing · Cozy · Idler

Chillquarium
Shared: Incremental · Cozy · Economy

Tiny Pasture
Shared: Incremental · Relaxing · Idler