Games like The Planet Miner
Games like The Planet Miner include Rock Bottom, Cookie Clicker, Shelldiver, Keep on Mining!, and Idle Champions of the Forgotten Realms. We matched them by the tags players give The Planet Miner on Steam (Casual, Adventure, Incremental, Mining, and Strategy): closest matches first, and among equally close ones the better-known games.

Rock Bottom
Shared: Casual · Incremental · Adventure

Cookie Clicker
Shared: Incremental · Casual · Idler

Shelldiver
Shared: Casual · Incremental · Resource Management

Keep on Mining!
Shared: Casual · Incremental · Mining

Idle Champions of the Forgotten Realms
Shared: Incremental · Strategy · Adventure

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

Chef Knight
Shared: Incremental · Casual · Strategy

Slime Rancher
Shared: Adventure · Exploration · Casual

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

DAVE THE DIVER
Shared: Casual · Adventure · Exploration

Russian Life Simulator
Shared: Incremental · Casual · Strategy

To The Core
Shared: Casual · Incremental · Adventure

Digseum
Shared: Casual · Incremental · Mining

Dragon Cliff
Shared: Strategy · Incremental · Casual

Achievement Clicker
Shared: Casual · Incremental · Adventure

Diggin
Shared: Incremental · Mining · Casual

Nodebuster
Shared: Casual · Incremental · Strategy

Melvor Idle
Shared: Casual · Adventure · Mining

Game Dev Tycoon
Shared: Casual · Strategy · Singleplayer

Tower Wizard
Shared: Incremental · Strategy · Resource Management

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

Incredicer
Shared: Casual · Incremental · Strategy

A Game About Digging A Hole
Shared: Mining · Exploration · Adventure

Fracture Field
Shared: Incremental · Mining · Casual