Top similar games like Extinction: Alien Invasion:
Extinction: Alien Invasion $4.99
Annihilate waves of aliens, build your base, improve your mercenary, do it all with a sound track bathed in rock. Extinction Alien Invasion is an arcade shooter with elements of RPG, inspired by games like: Dead nation, Shadowgrounds, Alien Breed and Alien Swarm.
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Escape from the Lostmoon$0.99
Cosmic pilot has lost his ship on the remote asteroid populated by disaster human colony. Hungry zombies, villainous mercenaries and monsters are everywhere. Only you ... and his awesome arsenal could lead hero to freedom.
Inbound UFO$7.99
With a style inspired by the RTS games from early 2000's, a new tower defense combines in a unique way action, tactics, replay value and fun. They are here! Choose your targets, upgrade, replay, discover your enemies and your tactical skills.
Transcendence$14.99
Explore the farthest reaches of Human Space in this open-world space adventure. Compelled to journey to the Galactic Core by a mysterious hyperintelligence, you must fight your way through dozens of star systems teeming with clashing empires, expansionist AIs, and fearsome xenophobes.
Silent Sector$14.99
Oldschool action open-world sci-fi with a unique storyline, frenetic battles, crude humor, loose morals and cows.
Arcade Mayhem Juanito$9.99
Arcade Mayhem Juanito is a retro experience about arcade-hopping. Teleport into different video games, play with unique mechanics inspired by well-known arcade games, face stunningly animated bosses and join the fight against the clonocell invasion.
X-Team$4.99
X-TEAM is a role-playing strategy with a non-linear narrative. You must form your squad and fight aliens around the world. Use dozens of weapons, paranormal abilities of heroes and your charisma to destroy the enemy!
The Outsiders$2.99
The Outsiders is a sci-fi top-down survival shooter, a fun little indie game where you play as the Alien Boss slaying humans who are invading your planet! Be the Boss, destroy multiple enemies with a single blow or all of them with your badass power!
Bullet VR$4.99
The year 2020. You are a real war hero, who has gone through a lot and seen a lot of bad things, but you has not seen anything like that. A huge threat has come to your favorite planet - the Earth.
Coffee Crisis$9.99
Coffee Crisis is an neo-rogue brawler that puts you in the shoes of the only baristas on Earth with enough heavy metal in their veins to fend off an alien assault. Play solo or join up with a friend to fight across eight locations ranging from your Coffee House HQ to the far reaches of outer space.
Captain Lycop : Invasion of the HetersFREE
A space shooter mixing adventure, action and tactics. Face off against pen-pushing insects, merciless enemies and epic bosses. Your only hope is to banish all cowardice and follow a virtuous path.
Kung Fu Jesus$14.99
Corrupt governments starting fake pandemics, secret societies controlling the world from the shadows and AI trying to take over the world. You would think I'm talking about planet Earth, but no it's Kung Fu Jesus! Let's see how deep the rabbit hole goes.
Bunch of Heroes$4.99
Pick up the Horror Pack for free during the Steam Halloween Sale! Offer ends November 1st at 10AM Pacific.
Party Hard 2$19.99
It's 3am and you just want to get some sleep. Welcome back to Party Hard! Stop parties using hundreds of new ways, incidentally destroy a drug syndicate, and save the Earth from an alien invasion. May the chickens be with you!
Space Commander 9$6.99
Space Commander 9 is a modern 3D space shooter game that puts you in the seat of an space ship with orders to defend the human race against the alien invasion.
Mobile Wars XFREE
Mobile Wars X is a shoot them up in which you must fight against an alien invasion. You can choose between 3 Mobile X: A very fast ship capable of firing tracking missiles, A robot with advanced ninja weapons and a special ship with unique laser attacks!
Barotrauma$34.99
Barotrauma is a 2D co-op submarine simulator – in space, with survival horror and RPG elements. Steer your submarine, complete missions, fight monsters, fix leaks, operate machinery, man the guns and craft items, and stay alert: danger in Barotrauma doesn’t announce itself!
Memeow & Comodore: Reloaded$2.99
Memeow & Commodore: Reloaded is a fascinating adventure where your pets are the heroes.Travel around the globe, even through space to discover a mysterious menace coming from another world... or dimension? To save Kim and all the Earth.
Otherworldly Air Gunship$1.99
This is a fun shooting game that includes tower defense elements. You will control an air gunship equipped with three main types of weapons and several powerful special weapons. And leap your army to defeat thousands of monsters from other worlds.
Unit 4$14.99
Fast paced platforming action, cooperative gameplay up to 4 players, an elite squad of agents with amazing skills, space travels, exploration, unique missions, fancy characters, incredible fights with huge bosses, trade, minigames and much more!
Hangeki$9.99
Hangeki is an arcade style shooter that emphasizes the use of over 50 spectacular weapons. Formulate new strategies and take on the alien invasion in this reimagining of the classic shoot em up.
War Platform$6.99
play the role of the More than three big countries in the world This is a prediction simulation game for the current and future combat concepts According to the known technology of today's mankind
Last Space Guardian$1.99
Survive 10 enemy stages! Shoot 'Em Up style, spaceship game, in pixel art and 8-bit retro music! Evolve your shot to the maximum level, use the energy bar for upgrades, and special abilities! Advance each stage by defeating Bosses and enemies to collect new skills, transformations and extra lives!
Oblivion's Edge$1.99
Oblivion’s Edge is an arcade and bullet hell inspired twin stick shooter with multiple game modes and difficulty levels. You are the last pilot on Earth, tasked with slowing down the invasion and giving survivors enough time to escape.
8-Bit Invaders!$14.99
8-Bit Invaders! is a fast-paced, retro Real-Time Strategy game for the PC. Control the military might of the Galactic Marine Corps or Invade with the devastating power of the Cranioids! Mine, Build, and Fight your way to victory! Conquering the Multiverse was never so easy.
Biolab Wars$4.99
Inspired by the 8-bit games and by the movies from the 80's, your goal is to blow things up, defeat aliens and fight bizarre bosses in this platformer 2D with classic mechanics.
Blaster Squad$4.99
Explosive side-scrolling couch co-op run'n'gunner with hundreds of levels and unlockable ammo types. 1-4 players.
Cosmic Invasion$4.99
Cosmic Invasion is a combination of strategy mixed in with quick frantic battles against fleets that contain many ships. The strategic layer is a 20 X 30 grid with 600 sectors. Move your ships around to protect your home planet and space stations from the invading fleets of UFO ships.
Star Merc$1.99
Star Merc is an open world rpg where player choices heavily affect outcomes and drastically change the storyline. The game is about exploring different planets, learning about the inhabitants and dealing with the different factions that like to think they control the universe.
Galacide$9.99
Command destructive spaceships to obliterate hordes of enemy vessels, while quickly solving puzzles to weave through networks of vibrantly colorful, adversarial machines!
MORDHAU$29.99
MORDHAU is a multiplayer medieval slasher. Create your mercenary and fight in brutal battles where you will experience fast paced combat, castle sieges, cavalry charges, and more.
Missiles Away$1.99
Humanity faces its darkest hour as an alien force launches a relentless invasion. As a skilled pilot, you must take control of a powerful combat helicopter and engage in a fast-paced, high-octane first-person shooter experience.
Spacejacked$9.99
A super fast-paced ARCADE TOWER-DEFENSE. Build turrets and shoot your way through hordes of alien scum as you protect multiple rooms simultaneously!
Mind The AbyssFREE
Mind the Abyss is a fast-paced movement shooter that combines fourth-dimensional abilities and ever-evolving weaponry within an alien planet.
Zombotron$14.99
Fight to survive on a mysterious alien planet, outwit its vicious inhabitants, and do whatever it takes to find a way off that wretched rock.
Rise High$1.99
Rise High is an arcade action game in which you have to defend your workers from an alien invasion while they try to build skyscrapers!
FEB - Brazilian Elite Force$1.99
After an alien arives in Brazil, the brazilian army created the FEB - Brazilian Elite Force, a high tech agency with only the best of the bests. Choose one of three agents: Samanta, Zolrys and Silva, and save Brazil from an alien invasion in this 2D platform/shooter game.
EARTH'S DAWN$3.99
Earth’s Dawn is looming and the fate of the planet hangs in the balance! Dive into frantic side-scrolling combat and take the fight to the alien horde before destroying hulking bosses!
The United SPACE of America$4.99
The United SPACE of America is a high action, arcade style, run-n-gun bullet hell, twin stick shooter that allows you to absorb enemy bullets with your Proton Sabre while you blast through countless enemies with your shoulder cannon. It takes a bit of hectic coordination. Can you master it?
Adventure of Emberclaw$3.99
Adventure of Emberclaw is an exhilarating action-adventure 3D platformer that promises both challenge and fun.
BoboInvasionFREE
BoboInvasion is a classic spaceshooter game. Face waves of aliens with increasing difficulty, dodge their attacks, and choose a ship upgrade that suits your style to win
Space Zombies Invasion$1.0
Welcome to SZI Space Zombies Invasion. In this game, you control a human who has to dodge zombies and fight vs aliens. Now you must find the talisman pieces to save humanity... Get resources, build houses, drive cars, resolve puzzles, enigmas, minigames & survive!
GunSuit Guardians$2.99
Gear up your GunSuit and defend Earth from an alien siege! Equip and upgrade unique arsenals of overpowered weapons to survive overwhelming numbers in this action-roguelite twin-stick horde survival.
Steel Rain - Dawn of the Machines$2.99
Steel Rain: Down of the Machines is a third-person shooter game, with characteristics of shmup. Control vehicles and have in hand a vast arsenal of weapons to fight against waves of different enemies with the objective of ridding the planet of a great threat.
Road to Eden$19.99
Road to Eden is a third-person multiplayer survival coop game, set within the post-apocalyptic ruins of a world destroyed by an alien invasion. You wake up at the side of the road with no memory and must team up with other survivors to make the long and dangerous journey to Eden.
GRAV$19.99
GRAV is a sand box experience where you explore a multitude of planets, hunt strange alien creatures, build and defend outposts, craft weapons and armor, and attempt to survive against other players in a hostile environment.
Epic Showdown$4.99
Mysterious Alien obsessed with TV Reality shows decide to organize his own reality show - Epic Showdown. He gathers the best fighters from all dimensions, universes, and realities to survive in a battle to the death!
Let Them Come$7.99
Let Them Come is a fast paced pixel art shoot ‘em up. Twitchy trigger fingers and focused battle tactics are the order of the day as wave after wave of alien-like creatures try to take you down.
Alien Shooter 2 - New Era$9.99
A desert, an abandoned city, cramped underground corridors of MAGMAs research centers, and for hundreds of kilometers around there is only darkness and thousands of monsters coming from all sides. You have only two options - to achieve your goal or die.
StarLightRiders: HyperJump$1.99
StarLightRiders: HyperJump is a fast paced and frantic multiplayer arcade shoot em up. Protect the solar system from the alien invasion and stop them from eliminating all life on Earth! Take control of the powerful HyperJump ships and blast the hell out of everything that moves.
Bashville$4.99
Bashville is a good old-fashioned shoot 'em up with loads of weapons and enemies to fight. Go through The Realm levels and defeat the various enemies found within. Use the level environment to your advantage.
XELAN FORCE$8.99
8BIT style vertical scrolling shooting game Zelan Force.We aimed to create a game that you can enjoy over and over again, such as the feeling of play that changes between offensive and defensive types, and the ability to search for hidden items.