Games like Macht: Cosmic Engine
Games like Macht: Cosmic Engine include Kerbal Space Program, Universe Sandbox, Kerbal Space Program 2, Totally Accurate Battle Simulator, and Spaceflight Simulator. We matched them by the tags players give Macht: Cosmic Engine on Steam (Space Sim, Strategy, Sandbox, Physics, and Time Manipulation): closest matches first, and among equally close ones the better-known games.

Kerbal Space Program
Shared: Sandbox · Space Sim · Physics

Universe Sandbox
Shared: Sandbox · Space Sim · Physics

Kerbal Space Program 2
Shared: Sandbox · Physics · Exploration

Totally Accurate Battle Simulator
Shared: Sandbox · Strategy · Physics

Spaceflight Simulator
Shared: Space Sim · Sandbox · Exploration

X4: Foundations
Shared: Space Sim · Sandbox · Exploration

RimWorld
Shared: Strategy · Sandbox · Colony Sim

WorldBox - God Simulator
Shared: Sandbox · Simulation · Life Sim

SPORE™
Shared: Sandbox · Exploration · Simulation

Internet Cafe Simulator 2
Shared: Exploration · Sandbox · Simulation

BeamNG.drive
Shared: Physics · Sandbox · Simulation

Teardown
Shared: Sandbox · Physics · Strategy

Space Engineers
Shared: Sandbox · Physics · Simulation

Hardspace: Shipbreaker
Shared: Physics · Sandbox · Space Sim

Aviassembly
Shared: Physics · Sandbox · Exploration

Prison Architect
Shared: Sandbox · Strategy · Simulation

Space Haven
Shared: Strategy · Sandbox · Colony Sim

Avorion
Shared: Space Sim · Sandbox · Exploration

Stellaris
Shared: Strategy · Sandbox · Exploration

Timberborn
Shared: Sandbox · Colony Sim · Strategy

Banished
Shared: Strategy · Sandbox · Colony Sim

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

Two Point Museum
Shared: Strategy · Sandbox · Simulation

EVE Online
Shared: Space Sim · Exploration · Sandbox