Top similar games like SIRIUS-4:

PlanetDrop - A Tiny Space Adventure is a computer game where you command a spaceship in an orbit of a planet. Your primary task is to capture "drop zones" with your shuttles and commandos. You rely on stealth, agility and speed, rather than on firepower.

Rogue Stargun is an action-packed space combat sim where you pilot 5 unique starfighters with interactive VR cockpits in a story-driven single player campaign consisting of over 24 unique missions covering both land and space.

The ultimate space capital ship combat compendium is the evolution of hard core space combat sims. The only game of its kind currently in existence.

Galactic Command Echo Squad SE is a high-end and very challenging space/planetary combat game. It offers a thrilling campaign, instant action combat sessions as well as a sandbox mode allowing you to explore the game's universe while battling hostile Insurgent forces among others.

A must for any fan, Star Trek: Starfleet Academy is an action/flight simulator featuring filmed footage of the original Star Trek actors. Take your place among the best and brightest at Starfleet Academy!

Captain your own space ship and roam the galaxy in 3D in this tactical space simulator with tons of RPG depth ! Space has never looked so inviting - but images can betray...It has been two years since the end of the second Gemini war, the situation in the wartorn system is further from resolution than ever.

Space combat on a massive scale. Defend your allies, destroy the Xeris and claim victory for the Vallen! Your people need you, fly your ship in an intense battle in an asteroid field to secure the sector.

Void Crew is a 1-4 player co-op First Person Space Adventure: Rally your crew, power your spaceship, and get ready for epic space battles, facing chaotic dangers you and your crew never trained for!

Out of cash, out of luck, out on the fringe. Juno Markev has a killer to tail, a debt to pay, and more trouble headed her way. Rebel Galaxy Outlaw takes place in a greasy, blue-collar world of outlaws, truckers, cops and thieves.

The hit mobile game Interstellar Pilot 2 has come to Steam. Join the TEF forces heading to the Gatopean sector to find a new home for mankind. Play how you like in this open world space-sim developed by Pixelfactor.

Start with nothing... End with everything! All you have is a basic ship, barely fit for combat, with it you'll start your journey and empire. A open world space sandbox, inspired by and expanding the classics.

Subdivision Infinity is an immersive and pulse pounding sci-fi space shooter featuring stunning graphics and tight spaceship game play. Hunt down and destroy enemy spacecraft, crush capital ships, mine asteroids for rare minerals, and find blueprints to craft amazing new vessels!

Spaceship building sandbox game. Build various spaceships from scratch and explore the cosmos. Fight different enemies and mine metals and materials to fix or expand your spaceship fleet.

Experience fast action, thrilling levels, spectacular explosions and lots of pew-pew-pew. Star Horizon is a reboot for the on-rails space shooter genre.

On a recently-terraformed planet at the edge of human space, waves of alien invaders have suddenly appeared. Take the pilot's seat of a VTOL fighter aircraft and wipe out the alien infection!

Explore the galaxy in this deckbuilding, sci-fi roguelike where ship upgrades and crew management are key to your survival. Optimize resource generation, engage in intense turn-based battles, and take on ever-growing threats as you seek out The Signal.

Interkosmos is an arcady astronaut adventure in VR. Brace yourself for a rush of hectic gameplay to challenge your inner cosmonaut, and a fun story full of twists and Cold War absurdities.

Edge of Infinity is a multiplayer space warfare game. Enter your starship and challenge your friends to all-out battles across the stars. Each match will be unique; containing different ships, weapons, armies, and strategy - all decided by the player.

Experience large space ship battles. Uncover the secrets of the mysterious alien race. Upgrade your ship or even start a fleet. Survive

The spiritual successor to Freelancer with a Lovecraftian, sandbox RPG twist. Explore a vast handmade universe that includes online multiplayer and mod support. You're going to need a bigger ship.

Age of Ascent: Arrival is a new space co-op and combat game featuring direct-piloting solo and co-op missions and real-time PvE and PvP battles set in stunning space scenes.

Master a new way to fly and fight. Control every movement and engine burn. Simple controls, realistic flight: a game for space fans by a space fan.

Remove fog, look for and mine minerals, construct buildings, upgrade the rover and reach the portal.

Venture out on an ambitious mission across the galaxy with a simple goal - to save your home planet. Bask in the dazzling light of distant stars, flashes of plasma cannons, and explosions of enemy ships! This action-packed space fighting simulator is just the thing for a lazy Saturday night!

After a galactic portal failure you find yourself lost millions of light years away from home, in a foreign galaxy... With your main propulsion systems disabled you are unable to traverse space, so you try to collect resources you find near you in order to create a galactic portal to return back.

Stellar Wanderer DX is an old-school space combat sim set in a vast open-world universe. Follow the story or choose your favorite side missions as a mercenary fighter pilot. Explore the galaxy, upgrade your ship and weapons, trade resources and fight outlaws.

Andromeda is a hybrid between a space 4X and an MMO for Android and PC. Get dropped into an online universe sandbox with 2 galaxies full of planets to colonize. Build structures like Mines to generate resources to build ships and engage in fleet battles with NPCs and other players.

Fly through the slums of futuristic Mumbai and complete various missions as Kyra - a member of the Nandaka gang. Transport illegal tech and mechanical enhancements, fight off rival gangs, chase down foes and explore hidden areas as you uncover the secrets of the metropolis

Outpost is a building and planet exploration game. An entire planet is available for you to explore.

1 Player, Sci-Fi, Arcade, Space Dog Fighter, Instant Action, 3D, Vehicle Combat. Click and play. All ships available without needing to unlock. Control Remapping, Sensitivity Settings, Game Settings. Complete Controller Support. Gun Selection. Achievements and Leaderboards. 43 Ships to pick from.

A unique open world sandbox space simulator. You have complete freedom of decision and movement. You can travel to familiar places in the Solar System and adjacent systems, or explore over 6000 unexplored distant worlds. Trade, fight, build factories and bases, colonize.

Leaving the formation is a story-driven sci-fi combat simulation based on honest Newtonian flight physics.

Fairspace is an amateur developed open-ended space exploration, trading and combat game. A full and rich persistent universe awaits your discovery.

This game is about flying in space. You must destroy asteroids from the explosion of an object near the planet Jupiter. You will also encounter other extraterrestrial objects and even UFOs.

Rebel Galaxy is a swashbuckling space adventure, with action-packed combat, exploration, discovery, trade, and “negotiation” with the outlandish denizens at the edge of the known universe.