Games like I Fetch Rocks
Games like I Fetch Rocks include Stormworks: Build and Rescue, Kerbal Space Program, Juno: New Origins, Stationeers, and Space Engineers. We matched them by the tags players give I Fetch Rocks on Steam (Flight, Programming, Sandbox, Immersive Sim, and Education): closest matches first, and among equally close ones the better-known games.

Stormworks: Build and Rescue
Shared: Sandbox · Flight · Immersive Sim

Kerbal Space Program
Shared: Sandbox · Space · Science

Juno: New Origins
Shared: Programming · Flight · Science

Stationeers
Shared: Automation · Sandbox · Base Building

Space Engineers
Shared: Sandbox · Space · Survival

Universe Sandbox
Shared: Sandbox · Space · Science

Dyson Sphere Program
Shared: Automation · Space · Sandbox

Factorio
Shared: Sandbox · Automation · Base Building

SpaceEngine
Shared: Sandbox · Flight · Space

Hydroneer
Shared: Sandbox · Automation · Mining

Ostranauts
Shared: Flight · Sandbox · Space

while True: learn()
Shared: Programming · Education · Sandbox

Kerbal Space Program 2
Shared: Sandbox · Space · Science

Kenshi
Shared: Sandbox · Immersive Sim · Survival

The Farmer Was Replaced
Shared: Programming · Education · Automation

Universe Sandbox
Shared: Sandbox · Education · Space

SimplePlanes
Shared: Flight · Sandbox · Automation

PC Building Simulator
Shared: Immersive Sim · Education · Sandbox

Reentry - A Space Flight Simulator
Shared: Flight · Space · Immersive Sim

Satisfactory
Shared: Automation · Sandbox · Base Building

Timberborn
Shared: Sandbox · Automation · Survival

Space Engineers 2
Shared: Sandbox · Space · Survival

The Last Caretaker
Shared: Sandbox · Automation · Survival

The Planet Crafter
Shared: Base Building · Survival · Sandbox