Single-player games like Next Space Rebels
Below are 12 single-player Steam games similar to Next Space Rebels, 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 Next Space Rebels page.
Ranked picks
- 1

Kerbal Space Program
Single-player alternative to Next Space Rebels — playable solo, no multiplayer required. Shares Indie and Simulation with Next Space Rebels.
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

Spaceflight Simulator
Single-player alternative to Next Space Rebels — playable solo, no multiplayer required. Shares Indie and Simulation with Next Space Rebels.
In Spaceflight Simulator, you will get to build your rockets, plan launches and flights, attempt landings, deploy payloads and explore new worlds.
- 3

Breathedge
Single-player alternative to Next Space Rebels — playable solo, no multiplayer required. Shares Indie and Simulation with Next Space Rebels.
Survive in outer space! Together with your immortal chicken, discover the truth behind your sudden spaceship crash. Craft tools, pilot vehicles, and even control space stations to survive and explore the wreckage.
- 4

Mars Horizon
Single-player alternative to Next Space Rebels — playable solo, no multiplayer required. Shares Indie and Simulation with Next Space Rebels.
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.
- 5

Juno: New Origins
Single-player alternative to Next Space Rebels — playable solo, no multiplayer required. Shares Indie and Simulation with Next Space Rebels.
Bring to life anything you can imagine from rockets and airplanes to cars and more. Automate them with a visual programming language. Explore 3D planets and make your own. Share your creations online. Complete contracts, conquer milestones, and unlock technology in the newly added Career Mode.
- 6

Nimbatus - Drone Creator
Single-player alternative to Next Space Rebels — playable solo, no multiplayer required. Shares Indie and Simulation with Next Space Rebels.
Use the Nimbatus Drone Creator to construct physically simulated drones and try them out in a virtual testing environment. Do you have what it takes to become a drone engineer?
- 7

Rocket Science
Single-player alternative to Next Space Rebels — playable solo, no multiplayer required. Shares Simulation with Next Space Rebels.
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.
- 8

Universe Sandbox
Single-player alternative to Next Space Rebels — playable solo, no multiplayer required. Shares Indie and Simulation with Next Space Rebels.
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.
- 9

BeamNG.drive
Single-player alternative to Next Space Rebels — playable solo, no multiplayer required. Shares Simulation with Next Space Rebels.
A dynamic soft-body physics vehicle simulator capable of doing just about anything.
- 10

Hardspace: Shipbreaker
Single-player alternative to Next Space Rebels — playable solo, no multiplayer required. Shares Simulation with Next Space Rebels.
Equipped with cutting-edge salvaging tech, carve & slice spaceships to recover valuable materials. Upgrade your gear to take on more lucrative contracts and pay your billion credits debt to LYNX Corp!
- 11

Spider
Single-player alternative to Next Space Rebels — playable solo, no multiplayer required. Shares Indie with Next Space Rebels.
Spider is a unique puzzle game that puts players in the role of a brave spider, exploring a variety of stunning environments and overcoming challenges. Players need to use the spider's special abilities and intelligence to solve puzzles and complete the objectives of each level.
- 12

Skeleton Village
Single-player alternative to Next Space Rebels — playable solo, no multiplayer required. Shares Indie with Next Space Rebels.
Old dilapidated houses, crumbling planks, an old moldy well, an oppressive atmosphere and limited space. The walls erected around the perimeter put pressure on the nerves.