Single-player games like Rocket Engineer
Below are 8 single-player Steam games similar to Rocket Engineer, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Rocket Engineer page.
Ranked picks
- 1
Kerbal Space Program
Single-player alternative to Rocket Engineer — playable solo, no multiplayer required. Shares Simulation with Rocket Engineer.
In Kerbal Space Program, take charge of the space program for the alien race known as the Kerbals. You have access to an array of parts to assemble fully-functional spacecraft that flies (or doesn’t) based on realistic aerodynamic and orbital physics.
- 2
Universe Sandbox
Single-player alternative to Rocket Engineer — playable solo, no multiplayer required. Shares Simulation and Casual with Rocket Engineer.
Create & destroy on an unimaginable scale with a realistic physics-based space simulator. Explore the beauty of our universe and the fragility of our planet. Use science to bend the laws of gravity, collide planets, boil away oceans, fire epic space lasers, and customize your universe.
- 3
Mars Horizon
Single-player alternative to Rocket Engineer — playable solo, no multiplayer required. Shares Simulation with Rocket Engineer.
Lead a major space agency as you guide humanity to Mars in this strategy simulation game. Construct a base, design and build rockets, conduct missions throughout the Solar System, and write your own history of Space exploration. Created with support from the European Space Agency.
- 4
X3: Terran Conflict
Single-player alternative to Rocket Engineer — playable solo, no multiplayer required. Shares Simulation with Rocket Engineer.
It is the year 2938. The long wished-for encounter of the X Universe and the Earth holds both joy and sorrow for the people. Despite flourishing trade, the clash of the diverse races, cultures and life forms creates new tensions, mistrust and open conflict that need to be overcome!
- 5
Rocket Science
Single-player alternative to Rocket Engineer — playable solo, no multiplayer required. Shares Simulation and Early Access with Rocket Engineer.
Take part in a space program. Design spacecrafts and send them off to explore the vast expanses of space. Experience the real scale of the Solar system and the size of its celestial bodies.
- 6
Take On Mars
Single-player alternative to Rocket Engineer — playable solo, no multiplayer required. Shares Simulation with Rocket Engineer.
Take On Mars places you right in the middle of mankind’s most exciting undertaking. Start out in the seat of a rover operator, finish as the first human to have ever set foot on the Red Planet.
- 7
Evochron Mercenary
Single-player alternative to Rocket Engineer — playable solo, no multiplayer required. Shares Simulation with Rocket Engineer.
The life of an independent mercenary is rarely without excitement. Your spacecraft awaits and your adventure begins in the Sapphire star system.
- 8
SpaceEngine
Single-player alternative to Rocket Engineer — playable solo, no multiplayer required. Shares Simulation and Casual with Rocket Engineer.
The world's first science-based photorealistic interactive 3D planetarium that models the entire Universe, using procedural generation for uncharted areas.