Games like Titans of Space PLUS
Games like Titans of Space PLUS include Kerbal Space Program, Universe Sandbox, Universe Sandbox, Elite Dangerous, and Hard Bullet. We matched them by the tags players give Titans of Space PLUS on Steam (Simulation, Indie, Adventure, Space, and Education): closest matches first, and among equally close ones the better-known games.

Kerbal Space Program
Shared: Simulation · Space · Science

Universe Sandbox
Shared: Simulation · Space · Science

Universe Sandbox
Shared: Simulation · Space · Indie

Elite Dangerous
Shared: Space · Simulation · VR

Hard Bullet
Shared: Simulation · VR · Indie

ADR1FT
Shared: Adventure · Space · Indie

Feed and Grow: Fish
Shared: Simulation · Indie · Early Access

Deliver Us The Moon
Shared: Indie · Adventure · Space

Rick and Morty: Virtual Rick-ality
Shared: Simulation · Adventure · Indie

Kerbal Space Program 2
Shared: Space · Simulation · Science

while True: learn()
Shared: Simulation · Indie · Education

Empyrion - Galactic Survival
Shared: Simulation · Space · Indie

Starship EVO
Shared: Indie · Simulation · Space

Solar System VR
Shared: Simulation · Adventure · Space

Astrox Imperium
Shared: Simulation · Space · Indie

Kinetic Void
Shared: Simulation · Indie · Space

Wobbly Life
Shared: Adventure · Simulation · Indie

Between the Stars
Shared: Simulation · Space · Indie

Spaceflight Simulator
Shared: Simulation · Space · Science

Celestial Command
Shared: Simulation · Indie · Space

Reentry - A Space Flight Simulator
Shared: Simulation · Space · Science

Beasts of Bermuda
Shared: Simulation · Adventure · Indie

Outer Wilds
Shared: Space · Adventure · Indie

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