Experience the King of Shooting Games, the arcade hit that captured the hearts of legions of fans and took the world by storm! Use your cannon to defend Earth from waves of descending alien Invaders!
Cost / License
- Free
- Open Source
Since
- Since 2013

Browse 1,473 Steam Games and Add-ons on AlternativeTo including popular Steam options.
Experience the King of Shooting Games, the arcade hit that captured the hearts of legions of fans and took the world by storm! Use your cannon to defend Earth from waves of descending alien Invaders!




Detroit: Become Human puts the destiny of both mankind and androids in your hands, taking you to a near future where machines have become more intelligent than humans.




Avorion is a procedural co-op space sandbox where players can build their own space ships out of dynamically scalable blocks. Fight epic space battles, explore, mine, trade, wage wars and build your own empire to save your galaxy from being torn apart by an unknown enemy.




Cry of Fear is a psychological single-player and co-op horror game set in a deserted town filled with horrific creatures and nightmarish delusions.




Developed by id® Software, the creators of DOOM® and QUAKE®, RAGE is a groundbreaking first-person shooter set in the not-too-distant future after an asteroid impacts Earth, leaving a ravaged world behind.




Crying Suns is a tactical rogue-lite that puts you in the role of a space fleet commander as you explore a mysteriously fallen empire. In this story rich experience inspired by Dune and Foundation, each successful run will uncover the truth about the Empire...




Railroad Tycoon was written by game designer Sid Meier and published by MicroProse and though it shares the "Tycoon" suffix, it is not related to other Microprose games such as RollerCoaster Tycoon and Transport Tycoon, which were developed by Scottish programmer Chris...




Stonehearth is a game of exploration and survival in an epic fantasy setting. Build your town, care for your hearthlings, and defend against marauding invaders.



Enter the Gungeon is a bullet hell dungeon crawler following a band of misfits seeking to shoot, loot, dodge roll and table-flip their way to personal absolution by reaching the legendary Gungeon’s ultimate treasure: the gun that can kill the past.




Star Conflict is an action-packed, massively multiplayer space simulation game that puts players in the role of elite pilots engaging in a widespread interplanetary skirmish. The whole world for PVP and PVE!.




Join in The Witcher universe’s favorite card game — available for free! Blending the CCG and TCG genres, GWENT sees you clash in fast-paced online PvP duels that combine bluffing, on-the-fly decision making and careful deck construction.



Prepare the perfect heist in this simulated and fully destructible voxel world. Tear down walls with vehicles or explosives to create shortcuts. Stack objects to reach higher. Use the environment to your advantage in the most creative way you can think of.



Races are completed by either completing the course as one would a normal racing game, "wasting" (wrecking) all other race cars, or killing all pedestrians on the level.




This Game may contain content not appropriate for all ages, or may not be appropriate for viewing at work: Some Nudity or Sexual Content, General Mature Content.




Find yourself trapped alone in a room with a ticking time bomb. Your friends have the manual to defuse it, but they can't see the bomb, so you're going to have to talk it out – fast!




Iris and the Giant is a fusion of a collectible card game with RPG and roguelike elements. You play as Iris, who must brave her fears in her imaginary world.




The Last Campfire is an adventure, a story of a lost ember trapped in a puzzling place, searching for meaning and a way home.




Join Alba as she visits her grandparents on a Mediterranean island. She is ready for a peaceful summer of wildlife exploration with her friend Ines, but when she sees an animal in danger, she realises she needs to do something about it.




ISLANDERS is a minimalist strategy game about building cities on colorful islands. Explore an infinite number of ever-changing new lands, expand your settlements from sprawling villages to vast cities and enjoy the relaxing atmosphere.




In this game, you control a mouse whose goal is to try and return with the cheese faster than all of the other mice. You are assisted by a (point based) Shaman, who has the ability to summon various physics-based objects to help the mice get the cheese and get back safely.

FTL is a spaceship simulation roguelike-like. Its aim is to recreate the atmosphere of running a spaceship exploring the galaxy (like Firefly/Star Trek/BSG etc.).




As the ruler of the last city on Earth, it is your duty to manage both its citizens and its infrastructure. What decisions will you make to ensure survival? What will you do when pushed to breaking point? Who will you become in the process?.




Combining the classic city building game experience with advanced macro-economics, Citystate aims to be the most realistic urban simulator ever made. Build the cities of a new Nation and bring about your vision of the ideal society.




Master iconic locomotives on high-speed services, long freight hauls or precise commuter traffic, and get creative with customisation tools in this advanced sequel. Climb into the cab in Train Sim World 2.



