Games like Stellar Forge
Games like Stellar Forge include Cookie Clicker, A Game About Feeding A Black Hole, Nodebuster, Shelldiver, and Loot Loop. We matched them by the tags players give Stellar Forge on Steam (Auto Battler, Simulation, Idler, Incremental, and Casual): closest matches first, and among equally close ones the better-known games.

Cookie Clicker
Shared: Idler · Incremental · Casual

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

Nodebuster
Shared: Incremental · Idler · Simulation

Shelldiver
Shared: Incremental · Casual · Idler

Loot Loop
Shared: Simulation · Incremental · Idler

Kerbal Space Program
Shared: Simulation · Space · Physics

Hardspace: Shipbreaker
Shared: Simulation · Space · Physics

Dyson Sphere Program
Shared: Space · Simulation · Resource Management

Bills Must Be Paid
Shared: Incremental · Idler · Strategy

Totally Accurate Battle Simulator
Shared: Simulation · Physics · Strategy

Firestone – Idle Clicker Online RPG
Shared: Auto Battler · Idler · Incremental

Click the Button
Shared: Casual · Idler · Incremental

Chef Knight
Shared: Simulation · Incremental · Casual

How To Grow a Black Hole
Shared: Simulation · Idler · Casual

Incredicer
Shared: Idler · Incremental · Casual

Dragon Cliff
Shared: Idler · Incremental · Strategy

Keep on Mining!
Shared: Idler · Incremental · Casual

Plague Inc: Evolved
Shared: Simulation · Strategy · Casual

Stellaris
Shared: Space · Simulation · Strategy

Book of Yog Idle RPG
Shared: Auto Battler · Simulation · Casual

Fortune Mill
Shared: Idler · Incremental · Simulation

SPACEPLAN
Shared: Incremental · Casual · Space

Russian Life Simulator
Shared: Simulation · Incremental · Singleplayer

Starvester
Shared: Idler · Incremental · Simulation