Games like X4: Envoy Pack
Games like X4: Envoy Pack include X4: Foundations, Elite Dangerous, Avorion, EVE Online, and X Rebirth. We matched them by the tags players give X4: Envoy Pack on Steam (Simulation, Space Sim, Sandbox, Economy, and Space): closest matches first, and among equally close ones the better-known games.

X4: Foundations
Shared: Simulation · Space Sim · Space

Elite Dangerous
Shared: Space Sim · Space · Simulation

Avorion
Shared: Sandbox · Space Sim · Space

EVE Online
Shared: Space Sim · Simulation · Space

X Rebirth
Shared: Simulation · Space Sim · Space

Kerbal Space Program
Shared: Simulation · Sandbox · Space

X3: Terran Conflict
Shared: Simulation · Sandbox · Space

Space Engineers
Shared: Sandbox · Simulation · Space

Stellaris
Shared: Space · Simulation · Sandbox

Dyson Sphere Program
Shared: Space · Simulation · Sandbox

Starminer
Shared: Space Sim · Sandbox · Economy

Supermarket Simulator
Shared: Simulation · Economy · Trading

Manor Lords
Shared: Simulation · Sandbox · Strategy

No Man's Sky
Shared: Space · Exploration · Sandbox

Ostranauts
Shared: Simulation · Space Sim · Sandbox

Universe Sandbox
Shared: Simulation · Sandbox · Space Sim

Kerbal Space Program 2
Shared: Sandbox · Space · Simulation

Prison Architect
Shared: Simulation · Sandbox · Base Building

Spaceflight Simulator
Shared: Space Sim · Sandbox · Simulation

Empyrion - Galactic Survival
Shared: Simulation · Space · Space Sim

SpaceBourne 2
Shared: Space Sim · Flight · Base Building

X3: Reunion
Shared: Simulation · Space Sim · Space

SPORE™
Shared: Sandbox · Simulation · Space

Cities: Skylines
Shared: Simulation · Sandbox · Economy