One of the most popular alternatives to Kerbal Space Program is Orbiter, which is free and open source. Other popular alternatives are Juno: New Origins, Children of a Dead Earth, Spaceflight Simulator and Reentry. You can choose from more than 10 Simulation Games like Kerbal Space Program for Windows, Linux, Android, Mac and iPhone.
Orbiter is a realistic 3D real-time space flight simulator program.
Fed up with space games that insult your intelligence and violate every law of physics? Orbiter is a simulator that gives you an idea what space flight really feels like - today and in the not so distant future.
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 download more from the community. Share your creations online.
United States
Children of a Dead Earth is a simulation of true-to-life space warfare. Design your spacecrafts using real world technologies. Traverse the solar system using actual orbit mechanics. Command fleets as the solar system descends into war, and see if you have what it takes to...
United States
In Spaceflight Simulator, you will get to build your rockets, plan launches and flights, attempt landings, deploy payloads and explore new worlds.
United Kingdom
Reentry is a space flight simulator based on real life spacecrafts. You create a new astronaut, gain levels and experience for every move you make by completing missions in space.
Gather resources, craft components, build vehicles, and code their logic in a physics-driven engineering sandbox and full scale space sim.
A game of missions, trade and space combat in the 31st century using the Pioneer Space Sim engine with many additions and improvements.
Built from the ground up with the spirit of discovery, Kitten Space Agency invites players and supporters to join a community pushing the boundaries of what a spaceflight program can be.
United Kingdom
Pioneer is a space adventure game set in the Milky Way galaxy at the turn of the 31st century. The game is open-ended, and you are free to explore the millions of star systems in the game. You can land on planets, slingshot past gas giants, and burn yourself to a crisp flying...
Unscripted, living and thriving universe. First person action from the ground to the stars and beyond. You is always yourself, scavenging your first fruit from the tree or standing on the bridge of your flagship.
United States
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.
Russia
