70%Strong matchUniverse Sandbox
96%32k96% positive reviews, Overwhelmingly Positive across 32k reviews·Sandbox · Space
—





Casual puzzle game on a cosmic scale. Build stars, planets and other cosmic objects. Evolve your cosmos using abilities of the stars from stellar winds to supernova.
Cosmic Composer
SteamBuild stars, planets and nebulae, then modify and combine them into new cosmic objects all the way to galaxies and black holes.
Cosmic objects have their own special abilities that cost cosmic energy to use.
Planets can collide and form a new kind of planet in the process.
Stars can use abilities like stellar winds, solar flares and supernovae. These can modify nearby cosmic objects in different ways, evolve them to something new or destroy them.
Using ability can trigger a chain reaction of multiple events so be careful not to destroy everything in a single supernova explosion... unless that's what you want.
Quests are build based or event based.
Build quest requires a set of cosmic objects to be in the quest area. For example a star and three different planets needs to be in the quest area to be completed.
Event quests require something to happen in the quest area for example a supernova explosion or planetary collision.
When all quests are completed the level is completed.
Cosmic Energy is used as a resource for every action and you have a limited amount of it.
Balancing energy usage is important for completing the level.
Will you safely complete needed quests or try to reach for a higher score?

Steam data © 2026 Valve Corporation. Trademarks are property of their respective owners.
All matches
Finding similar games…
Universe SandboxShares Sandbox · Space Sim · Science , adds Education96% · 32k positive reviews70%Strong match—
Cosmic DJShares Casual , adds Music89% · 761 positive reviews69%Strong match—
Drifter Star: EvolutionShares Space Sim · Relaxing , adds Physics74% · 1k positive reviews69%Strong match—
StarboundShares Space · Sandbox · Building , adds Open World Survival Craft91% · 87k positive reviews68%Strong match—
SpaceEngineShares Sandbox · Space Sim · Science , adds Open World96% · 9k positive reviews63%Good match—
Cosmoteer: Starship Architect & CommanderShares Building · Space Sim · Sci-fi , adds 2D94% · 13k positive reviews69%Strong match—All matches
The best games like Cosmic Composer are Universe Sandbox, Cosmic DJ, Drifter Star: Evolution, Starbound, and SpaceEngine.
Match on: filter matches for Cosmic Composer by tag
Filters all matches
65%+Strong matches
50%+Good matches