Games like Volden Idle
Games like Volden Idle include Nodebuster, Shelldiver, Cell to Singularity - Evolution Never Ends, Click and Conquer, and Digseum. We matched them by the tags players give Volden Idle on Steam (Simulation, Casual, Idler, Incremental, and 2D): closest matches first, and among equally close ones the better-known games.

Nodebuster
Shared: Casual · Incremental · Simulation

Shelldiver
Shared: Casual · Incremental · Idler

Cell to Singularity - Evolution Never Ends
Shared: Simulation · Incremental · Idler

Click and Conquer
Shared: Casual · Simulation · Incremental

Digseum
Shared: Casual · Incremental · Idler

Cookie Clicker
Shared: Idler · Incremental · Casual

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

Melvor Idle
Shared: Idler · Casual · 2D

Keep on Mining!
Shared: Casual · Idler · Incremental

Loot Loop
Shared: Casual · Simulation · Incremental

Potion Craft: Alchemist Simulator
Shared: Simulation · Singleplayer · Crafting

Space Rock Breaker
Shared: Casual · Incremental · Idler

Chef Knight
Shared: Simulation · Incremental · Casual

Scritchy Scratchy
Shared: Incremental · Idler · Simulation

Click the Button
Shared: Casual · Simulation · Idler

To The Core
Shared: Casual · Incremental · 2D

Russian Life Simulator
Shared: Simulation · Incremental · 2D

xiuzhen idle
Shared: Idler · Casual · Simulation

Fortune Mill
Shared: Idler · Incremental · Simulation

Outhold
Shared: Incremental · Casual · Minimalist

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

Piñata Go Boom
Shared: Casual · Simulation · Incremental

Game Dev Tycoon
Shared: Simulation · Casual · Singleplayer

Mini Metro
Shared: Simulation · Minimalist · Casual