Games like Nebulis Entity
Games like Nebulis Entity include No Man's Sky, Elite Dangerous, Empyrion - Galactic Survival, X4: Foundations, and The Long Dark. We matched them by the tags players give Nebulis Entity on Steam (Exploration, Space, Simulation, Survival, and PvE): closest matches first, and among equally close ones the better-known games.

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

Elite Dangerous
Shared: Space · Exploration · Space Sim

Empyrion - Galactic Survival
Shared: Simulation · Space · Survival

X4: Foundations
Shared: Space · Simulation · Exploration

The Long Dark
Shared: Exploration · Survival · First-Person

EVE Online
Shared: Exploration · Space Sim · Space

Avorion
Shared: Exploration · Space · Space Sim

Space Engineers
Shared: Space · Survival · Simulation

PULSAR: Lost Colony
Shared: Simulation · Space Sim · Space

Kerbal Space Program
Shared: Space · Simulation · Space Sim

ICARUS
Shared: Survival · Exploration · PvE

Void Crew
Shared: Space Sim · PvE · Space

Outer Wilds
Shared: Exploration · Space · Atmospheric

Deep Rock Galactic
Shared: PvE · Exploration · First-Person

Spaceflight Simulator
Shared: Space · Simulation · Exploration

Universe Sandbox
Shared: Simulation · Space · Space Sim

Internet Cafe Simulator 2
Shared: Exploration · Simulation · 3D

IXION
Shared: Space · Survival · Exploration

Exo One
Shared: Space · Exploration · Atmospheric

Kerbal Space Program 2
Shared: Space · Exploration · Simulation

Drive Beyond Horizons
Shared: Exploration · Survival · Simulation

Tin Can
Shared: Space · Simulation · Survival

Cosmoteer: Starship Architect & Commander
Shared: Space · Exploration · Space Sim

Starbound
Shared: Space · Survival · Exploration