Games like Defending Earth
Games like Defending Earth include Internet Cafe Simulator 2, PC Building Simulator, Supermarket Simulator, Kerbal Space Program, and Crusader Kings III. We matched them by the tags players give Defending Earth on Steam (Action RTS, Immersive Sim, Real Time Tactics, Management, and Space): closest matches first, and among equally close ones the better-known games.

Internet Cafe Simulator 2
Shared: Management · Immersive Sim · Life Sim

PC Building Simulator
Shared: Immersive Sim · Management · Simulation

Supermarket Simulator
Shared: Management · Immersive Sim · Life Sim

Kerbal Space Program
Shared: Space · Physics · Space Sim

Crusader Kings III
Shared: Strategy · Management · Grand Strategy

911 Operator
Shared: Management · Strategy · Real Time Tactics

Stellaris
Shared: Space · Strategy · Grand Strategy

Cash Cleaner Simulator
Shared: Immersive Sim · Management · Physics

Attack on Toys
Shared: Action RTS · Real Time Tactics · Grand Strategy

Space Reign
Shared: Real Time Tactics · Space · Action RTS

Creeper World 4
Shared: Real Time Tactics · Space · Strategy

Recycling Center Simulator
Shared: Management · Immersive Sim · Life Sim

Hardspace: Shipbreaker
Shared: Space · Physics · Simulation

X4: Foundations
Shared: Space · Space Sim · Strategy

Dyson Sphere Program
Shared: Space · Management · Strategy

Game Dev Tycoon
Shared: Management · Strategy · Simulation

Elite Dangerous
Shared: Space · Space Sim · Simulation

Sins of a Solar Empire®: Rebellion
Shared: Management · Space · Strategy

Police Chief Simulator
Shared: Management · Immersive Sim · Life Sim

Mars Horizon
Shared: Management · Space · Strategy

Space Crew: Legendary Edition
Shared: Management · Space · Strategy

Universe Sandbox
Shared: Space · Physics · Space Sim

Spaceflight Simulator
Shared: Space · Space Sim · 2D

60 Seconds! Reatomized
Shared: Immersive Sim · Strategy · 2D

