Top similar games like Gastro Force:
Gastro Force $6.99
The player takes the role of the last soldier of the highly specialized "Gastro Force", elite troopers trained to infiltrate the enormous alien guts to fight them from the inside!
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Super Turbo Demon Busters!$11.99
STDB! is a rogue-like game about hardcore mercenaries and space marines escaping from a very cozy planet filled with monsters, nuclear fire, viruses and pixelated violence.
Pop Some Eyes$3.99
Pop Some Eyes is a FPS game where you control Mr. Pineapple Bundy, in a space jail where he must fight aliens to survive. The game features fast-paced action, unique sci-fi/comedy storyline, and 3 different weapons. Help Mr. Pineapple navigate the dangers of the space jail and defeat alien forces.
Crimson Glaive Sigma$4.99
Enjoy this 2D metroidvania-like bullet hell platformer. Jump, dodge and traverse using your jet pack. Find weapons and abilities. Fight bosses and escape an old space station drifting through the cosmos. You are alone, with nothing but a space suit and a gun. Just keep going! Persevere and triumph!
Sophstar$9.99
A vertical arcade shoot'em up with an inventive teleport system, lots of fast-blazing action and explosions, tons of boss fights, a risk/reward based score system and a proper challenge for both veteran and new players of the genre.
Kronostasis$9.99
A fast-paced FPS following a sci-fi story taking inspiration from Greek mythology and blending it with fantasy elements. As a security robot aboard a deep space mining vessel, you must face an unknown threat when crewmembers start turning into creatures of ancient myth.
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.
Warchasm$12.99
Battle hordes of murderous mechs as you hurtle through the canyons, chasms and caves of an alien world in a desperate bid for survival.
Space intruders alliance$8.99
Our planet's trading port is under attack by an alliance of raiders, defend the station and attack the intruders.
Us Against Aliens$9.99
Us Against Aliens is a survival shooter game on a spaceship that flies towards Earth. On the ship, something is constantly happening and you need to solve these problems along the way by shooting back from aliens who are constantly hunting you
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.
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.
DOSMan: Space Aliens in Space!$2.99
Planet DOS is under attack by Space Aliens, DOSMan needs to fend them off and defend his home planet!
Prodeus$24.99
Prodeus is a first-person shooter of old, re-imagined using modern rendering techniques and technology. Experience the quality you’d expect from a modern AAA game, designed with retro aesthetics and gameplay that invoke the tech-imposed limits of older hardware.
Natural Selection 2$4.99
A fast paced multiplayer shooter that pits aliens against humans in a strategic and action-packed struggle for survival!
Mission Critical : Foresight$11.99
When scientists resumed their Unified Field Theory experiments this time they succeeded- with devastating consequences. You are trapped on a desolate Lunar Base with only your wits, real world astronaut weapons and a heads up display to give you instructions.
Overdriven Evolution$14.99
Destroy Huge Bosses, dodge thousand of bullets and resolve quick puzzles with your powerfull space ship ! New and remade stages with improved graphics and 3D environments. More enemies and more bullets !
Exovoid Carnage$19.99
This HEART-POUNDING WAVE-BASED ARENA SHOOTER catapults you into an alien-infested space station. SHOOT, SHRED, and SURVIVE as you crush enemy hordes, dodge chaos, and challenge yourself to set a new record. The battle escalates with every second—GET IN THERE and FIGHT!
Code Arcturus$3.99
Code Arcturus is a retro inspired arcade-style action platformer, with aliens, robots, spikes, explosions, and lots of coins. Blast your way through levels, compete for the fastest times on the leaderboards in Speedrun mode, or put your skills to the ultimate test in Nerfed mode
SYNCFREE
Launch the SYNC protocol, where you are the ultimate weapon. Your job is to commandeer different robotic synth’s abilities in a high-octane, first-person frenzy. Master the art of SYNCing, and control the pace of battle.
Gunlocked$4.99
A twin stick shooter without the twin stick, Gunlocked is a sci-fi action roguelike about careful positioning and upgrade selection. Manage unique targeting systems across multiple weapons and upgrades, as you battle legions of alien ships, and then do it all over again!
Desecrators$14.99
Desecrators is a retro FPS inspired by '90s six-degrees-of-freedom shooters. Plunder your way through the galaxy to destructive weapons and technology powerful enough to take on the ultimate heist: The legendary vaults of the Galactic Treasury.
Notrium$1.99
You have crash-landed on Notrium. Your food supplies are running low, and a pack of predatory aliens have your scent. You're out of bullets for your pistol, your only weapon a handful of rocks. A freezing night is setting in, and you are desperately looking for firewood. Can you survive?
Infested: Space Colony$4.99
Infested: Space Colony is an intense action top-down shooter in a dimly-lit environment where aliens roam in shadowy darkness. Explore various sections of the colony ship. Hunt down aliens before they hunt you down.
Absolute BlueFREE
Sidescrolling Shoot’em’up that will transport you back into the 90s (and space).
The Indie Game Legend 3D$9.99
Blast vicious aliens, explore their mysterious labyrinth, and rescue indie game makers in this lighthearted NES inspired first-person action adventure!
Close Contact$4.99
Close Contact is a narrative-driven, sci-fi horror game where you must navigate an advanced underground base whilst avoiding the alien creature that stalks you.
SENTRY$19.99
SENTRY is an action-defense first person shooter where you defend your spaceship against invading aliens. Plot an escape route through hostile space and battle the enemy across your vessel with the support of traps, turrets and environmental destruction.
Out There Somewhere$9.99
You play an explorer stranded on a dangerous alien planet. Low on fuel, your only hope for escape is to find the planet’s core in this incredibly clever action-puzzle-platformer.
Alien Death Mob$1.99
Aliens have invaded Earth! Towns, cities, deserts, they're everywhere! Take on the role of Earth's last super soldier and confront the alien menace in this intense twin stick shooter!
Pawn Planet$9.99
You're in charge of managing the pawn shop in this weird galaxy. Make deals with strange customers, flip items, attend auctions and keep the shop going!
Gratuitous Space Shooty Game$3.99
Gratuitous Shooty Game is a hobby space shooter made by the developer of Gratuitous Space Battles, reusing the art from that game :D.
Escape the Kreegan$4.99
Escape corruption and deliver truth to the people in the only way you know how. as a space fighter pilot! You steal a ship and flee, it falls to you to duke it out in space and deliver truth to the people. Restore peace. Restore justice. Save humanity and Escape The Kreegan!
Switch 'N' Shoot$3.99
Endless arcade action with just ONE button - Switch directions whenever you shoot!
Space Captain McCallery - Episode 3: The Weaponmaster's Challenge$4.99
Captain McCallery voyages to a planet of prehistoric monsters in search of a reclusive Weaponmaster.
Star Mine$5.58
Star Mine is a 3D first person perspective space shoot 'em up. Awesome old school action! The old federation is dying, poor and desperate. Deep outside the boundaries of known space, alien mines are protected. But not from you. Take cargo, blast star jewel's from asteroids, steal energy and flight.
Alien Life Lab$7.99
Giedi Satellite takes a job as a wildlife handler on a colossal nature preserve space station that goes awry in comedic and horrific fashion. Become an Alien Wildlife Control Specialist in this horromedy adventure.
Alien Flex$4.99
Aliens are very fond of flex. This guy is no exception, he wants to dance for you. But for that he needs space drugs for aliens. You need to kill all the guards and steal drugs.
Alien Shooter 2 - The Legend$14.99
Meet the completely reworked legendary game loved by millions of players worldwide! Alien Shooter 2 - the Legend is an ambitious follow-up to the famous Alien Shooter series.
Relentless Frontier$14.99
Relentless Frontier is a fast paced sci-fi FPS running on the GZDoom Engine, with a strong focus on mobility, strategy, and exploration. Use your Omnistruct to replicate new weapons and abilities to help you traverse the terrain and demolish threats, while escaping from Ross 128-b in one piece.
The Future Project$9.99
Take control of an AI soldier, explore planets, and partake in fast paced combat in The Future Project, a first person metroidvania. Explore distinct worlds, obtain new weapons and abilities, and defeat powerful enemies in humanity's quest to journey the stars.
Drone Break$9.99
Brutal, high action, randomized run n gun blast a thon.
Graceful Explosion Machine$12.99
Skillfully pilot the Graceful Explosion Machine, a fighter ship armed with a ludicrously overpowered quad-weapon array! Lost in deep space, you'll shoot, dash and combo your way through jewel-hued uncharted planets, fighting an alien armada to find a way home.
Quantum of Hope$1.99
Humanity is (not) doomed. Use your Skills and excessive firepower to shoot your way through alien swarms and rescue mysterious Princess in distress.
Alien Weapon Test Grounds$1.99
Alien weapons with unique physics await in this fast-paced FPS. Battle waves of enemies across diverse landscapes, lighting, and weather. Beware the unstable space-time continuum.
Deep Nest$4.99
Deep Nest is a fast-paced single player action shooter roguelite where you play a space marine fighting off an endless horde of alien monsters in an infested facility.
GUNPIG: Firepower For Hire$0.99
Sci-fi top-down twin-stick shooter with 9 weapons, 3 alts and secret hidden collectibles!
Infected spaceship generator$1.99
Generator of random mazes with a search for objects, ammunition and weapons. Random placement of enemies such as zombies and mutants, including minibosses. Each new game will be unique.
SuperOffice$9.99
SuperOffice is an intense top down view shooter experience where time moves only when you move.
Zombaliens$15.99
Kill aliens in creative ways in this wacky retro FPS featuring non linear, highly interactive maps. Zombaliens blends retro FPS with immersive sim, letting you use anything in your environment against your enemies, while retaining the speed and simplicity of a retro FPS.
Jack Big Chin: Alien Invasion$2.99
Save humanity! Help Jack Big Chin defeat the alien invaders, in a hard action-adventure game with 3D platform elements, where you must improve your weapons and activate cannons to complete your missions.
Cosmotroid$7.99
Escape from the asteroid X-474 which has been invaded by aliens. Take your weapons and destroy every enemy who tries to stop you in this amazing arcade style third person shooter game full of action, creatures and explosions.