Simulate the physics of the Universe on a large scale and create stunning visuals. Play with intergalactic interactions, smash planets together and even create the Big Bang itself!.




Browse 1,473 Steam Games and Add-ons on AlternativeTo including popular Steam options.
Simulate the physics of the Universe on a large scale and create stunning visuals. Play with intergalactic interactions, smash planets together and even create the Big Bang itself!.




Do you want to build your own city? In TheoTown you can watch your own city growing. Declare zones for residential, commercial or industrial buildings and build road to connect them. Make your city more attractive by building parks, schools and so on.

The Forza Motorsport series (or just Forza for short) of racing games simulation games developed by Turn 10 Studios and published by Microsoft Games Studios, exclusively for the Xbox, Xbox 360 and Xbox One games consoles.




Aerofly FS is a one of the most sophisticated Flight Simulators suitable for beginner and professional flight sim pilots alike. Explore the world of flying with extremely detailed and accurately simulated airliners, fully interactive 3D cockpits and realistic aircraft systems.




Gunner, HEAT, PC! (GHPC) is a simulation game about modern mounted combat, with special attention to authenticity and fun.




Foxhole is a massively multiplayer game where thousands of players shape the outcome of a persistent online war. Every individual soldier is a player that contributes to the war effort through logistics, base building, reconnaissance, combat, and more.




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.




Real-time planetary collision sandbox powered by SPH physics: smash planets together and watch the destruction and its aftermath!.




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...




From one of the developers behind the original Rainbow Six® and Ghost Recon® games, comes a thinking-man's first-person shooter featuring in-depth character and weapon customization. Take your time. Think ahead. Get the job done.




Simulation & rendering software that uses Smoothed Particle Hydrodynamics (SPH) to simulate collisions of celestial bodies, accretion disks around black holes, or formation of galaxies in the early universe.




In this app you can explore almost any moon or planet of our solar system and visit remarkable nearby stars and see their location in the Milky Way. But you can also change existing bodies or add new ones and make a solar system of your own.




Physics sandbox game that uses a graphics card as a supercomputer. Change the laws of physics, design mechanisms, create A-Life worlds and inhabit them with living beings.


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.




A narrative-driven time loop adventure in ancient Rome. Discover the ruins of an ancient underground city, travel 2000 years into the past, and unravel the mystery of who destroyed it by cleverly exploiting the power to wind back time. The fate of the city is in your hands.




The All-in-One Simulation! Drive highly detailed and licensed real buses & trams, build and design your own transport company, and grow your network in a European-inspired city.




In Spaceflight Simulator, you will get to build your rockets, plan launches and flights, attempt landings, deploy payloads and explore new worlds.



Hitman is an action-adventure stealth video game series. The series revolves around Agent 47 (usually simply referred to as "47" or "Mr. 47"), a cloned assassin-for-hire, whose flawless record places him in high demand among the wealthy and elite.




Hey Lightcatchers! Are you ready for massive 60-player shootouts? Enjoy fast-paced hero shooter action in Farlight 84!.




EVGA Precision X1 allows you to fine tune your EVGA graphics card for the maximum performance possible, with Core/Shader/Memory clock tuning, real time monitoring support including in-game and compatibility with almost all EVGA graphics cards.




World of Tanks is a team-based MMO (massively multiplayer online game) dedicated to tank warfare in the mid-20th century.




Bring all of the imaginative aircraft you've had in your head to life. Snap parts together to build your airplane's body. Place engines to add thrust. Design the wings and then strap yourself into the pilot's seat and see how it flies.




VTube Studio is the tool of choice for any Live2D VTuber! With a wide variety of features, it has never been easier to connect with your viewers!! VTube Studio can be used directly with your webcam on any Windows PC or Mac.




Meganoid is a challenging shooter/platformer with randomly generated levels to make every game unique. Descend into the depths of the Meganoid space ship collecting items to enhance your abilities.




Frozen State is an open-world survival game with roguelike elements. The game casts players into a man-made ice age where hunger, thirst and sleep present constant threats in an already dismal world.



