Games like Planet Genesis 2
Games like Planet Genesis 2 include Kerbal Space Program, Universe Sandbox, SpaceEngine, PC Building Simulator, and SPORE™. We matched them by the tags players give Planet Genesis 2 on Steam (Immersive Sim, Idler, Casual, Sandbox, and Simulation): closest matches first, and among equally close ones the better-known games.

Kerbal Space Program
Shared: Sandbox · Simulation · Space

Universe Sandbox
Shared: Sandbox · Simulation · Space

SpaceEngine
Shared: Casual · Sandbox · Space

PC Building Simulator
Shared: Immersive Sim · Simulation · Education

SPORE™
Shared: Sandbox · Simulation · Casual

Universe Sandbox
Shared: Sandbox · Simulation · Science

Kerbal Space Program 2
Shared: Sandbox · Space · Science

The Sims™ 4
Shared: Simulation · Sandbox · Casual

Spaceflight Simulator
Shared: Sandbox · Simulation · Space

House Flipper
Shared: Simulation · Sandbox · Casual

X4: Foundations
Shared: Simulation · Space · Sandbox

Space Engineers
Shared: Sandbox · Simulation · Space

No Man's Sky
Shared: Space · Open World · Sandbox

Car Mechanic Simulator 2021
Shared: Simulation · Sandbox · Immersive Sim

Elite Dangerous
Shared: Space · Simulation · Space Sim

112 Operator
Shared: Casual · Simulation · Immersive Sim

Kenshi
Shared: Sandbox · Immersive Sim · Simulation

Thrive
Shared: Simulation · Sandbox · Science

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

EVE Online
Shared: Space Sim · Simulation · Space

PowerWash Simulator
Shared: Casual · Simulation · Sandbox

Garry's Mod
Shared: Sandbox · Casual · Simulation

Goat Simulator
Shared: Simulation · Sandbox · Casual

Trove
Shared: Sandbox · Free to Play · Open World

