Games like Hotloop
Games like Hotloop include Kerbal Space Program, Hardspace: Shipbreaker, Universe Sandbox, Elite Dangerous, and Space Engineers. We matched them by the tags players give Hotloop on Steam (Space Sim, Twin Stick Shooter, Physics, Space, and Simulation): closest matches first, and among equally close ones the better-known games.

Kerbal Space Program
Shared: Space · Physics · Simulation

Hardspace: Shipbreaker
Shared: Space · Physics · Simulation

Universe Sandbox
Shared: Space Sim · Simulation · Space

Elite Dangerous
Shared: Space Sim · Space · Simulation

Space Engineers
Shared: Space · Physics · Simulation

Kerbal Space Program 2
Shared: Space · Physics · Simulation

Solar Expanse - Space Exploration Manager
Shared: Space · Simulation · Physics

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

Starpoint Gemini 2
Shared: Space · Simulation · Space Sim

V: Rings of Saturn
Shared: Space · Physics · Space Sim

X4: Foundations
Shared: Space Sim · Space · Simulation

SpaceEngine
Shared: Space Sim · Space · Sci-fi

X Rebirth
Shared: Space · Space Sim · Simulation

Spaceflight Simulator
Shared: Space Sim · Space · Simulation

Avorion
Shared: Space Sim · Space · PvE

Universe Sandbox
Shared: Simulation · Physics · Space

EVE Online
Shared: Space Sim · Space · Simulation

House of the Dying Sun
Shared: Space Sim · Space · Simulation

Void Crew
Shared: Space Sim · PvE · Space

Warhammer 40,000: Space Marine 2
Shared: Action · PvE · Sci-fi

Deliver Us The Moon
Shared: Space · Action · Space Sim

EVERSPACE™
Shared: Space · Space Sim · Action

Between the Stars
Shared: Space · Simulation · Space Sim

Rebel Galaxy
Shared: Space · Space Sim · Sci-fi