Top similar games like Gastro Force:

In the future, humans conquered the stars and colonized other planets. In the bowels of the icy planet, scientists have discovered a natural and safe source of energy. But at the same time, they awakened an ancient alien life form. There is a conflict on the planet. Volunteers come to the rescue.

Blast through 28 levels in this FPS inspired by classic retro games. Levels span across 3 game modes ending with unique epic boss battles to test your skills. Find hidden medals, discover hidden objectives, and level up your character all while trying to survive an onslaught of nostalgic foes.

Space bounty hunter Falco must explore the solar system in search of his ex-girlfriend and destroy the Black Star cult. Collect bounties, upgrade your equipment, explore planets, crack wise & fight aliens in this GZDoom-powered Retro-FPS adventure.

The Alien Weapon Test Grounds is an Arena FPS where you use powerful alien-made weapon to survive relentless waves of robots. Sharpen your shooting skills in dynamic arenas, ranging from ancient ruins to otherworldly environments, and experience stunning, immersive graphics.

Battle for Ercaton: Robot Uprising is a first-person shooter where the player takes on the role of an earthling who crashed a spaceship and ended up on the planet Ercaton, which is inhabited by dangerous robots.

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!

This game invites you to an action-packed adventure. What could you sacrifice to save a military base captured by aliens from aliens?

In Alien Boom Boom you will send your enemies flying utilizing a powerful arsenal of weapons and upgrades. The game features a fully voiced story campaign, several distinct levels, several enemies, bosses and frequent player/weapon upgrades that are customizable at the start of each level.

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.

Introducing Ultimus: A Vision of First-Person Shooters, circa 1965.

Space Ranger: First Meet... is a short first-person shooter. In this game, you have to fight your way through hordes of robots in search of a safe place. You will use the environment to overcome obstacles and find a way out.

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.

Welcome Human-V1399 to the "Human Restoration Program," the final hope for the rebirth of mankind. In this physics-based movement shooter, use telekinetic powers to defeat hostile alien-built creatures through the depths of an irradiated planet in a conflict-ridden solar system.

NEURO is a narrative first-person shooter in a cyberpunk setting. The action is taking place in the future, in the 4th century of the Space Era, which starts after humans invent a hyperspace engine.

Polyhedron: tales from Krasnoslavia - is a dynamic first-person shooter in the Eastern European cyberpunk setting. You can expect cool firearms, numerous unique abilities, diverse gameplay, and much more

Travel through the galaxy and beat space demons to a bloody pulp in this intense first-person boomer shooter! Use a variety of weapons and powerful drinks created for one purpose only – to bring destruction and lots of blood.

EVECTOR is a small open-world arcade FPS shooter fast powerful enemies. Navigate your way through the hostile Acid Planet. If you're seeking a classic FPS gaming experience combined with the freedom of open-world exploration, give this one a try

Be the cactus, become the legend! Master foes, evade traps, and uncover artifacts as a spiky hero in this unique indie FPS, blending classic elements with quirky new ideas.

BLAST YOUR WAY through the UK's forgotten favourite space adventure: Space Quest 2099!Enjoy combat and movement based on the designs of the Quake 3 engine. Go alone or team up and shoot baddies in cooperative episodes with FULL MOTION VIDEO with SPECIAL EFFECTS!

SPRAWL is a hardcore retro FPS set in an endless cyberpunk megalopolis. Escape the walled city and take on the militarized government of the sprawl. Fueled by the blood of your enemies and a mysterious voice in your head, make your way towards the spire to topple whatever lays within.

Aliens are decimating New York City, only you have the technology to survive. Be The Weapon.

Protect the lighthouse, destroy nests and complete tasks.

Core Alpha is an arcade first-person shooter, which is made in the best traditions of old-school shooters. Fight and defeat hordes of zombies, as well as destroy infected cores to fight the main enemy.

Roguelite replayability meets FPS action in Rogue Weapon as you clear enemy outposts and try to escape your captors. Whether you do so quietly or with pure chaos is up to you.

Originally planned as a section of the Highway 17 chapter of Half-Life 2, Lost Coast is a playable technology showcase that introduces High Dynamic Range lighting to the Source engine.

Blast vicious aliens, explore their mysterious labyrinth, and rescue indie game makers in this lighthearted NES inspired first-person action adventure!

In deep space, your robot transport vehicle crash-landed on a barren asteroid. The robots have escaped and are hungry for both revenge and crunchy humans. You are their only hope. Battle your way through multiple waves of rouge robots to avoid being SWARMED in this retro, heart pounding game.