Top similar games like DOSMan: Space Aliens in Space!:
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!
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K37-D$1.99
In the year 2204 an average engineer gets an ordinary job offer that ends up being a lot more than he bargained for...

illWill$19.99
Eliminate hordes of monsters in a thrilling first person shooter - ILLWILL.

CARNAL$0.99
CARNAL is a fast and challenging retro FPS straight from the mid '90s. The Sons of Anak are opening portals to extract Dark Matter from the "other side". Combat the possessed soldiers, the manifested demons helping them, and any inanimate objects standing in your way!

Chop Goblins$4.99
The Chop Goblins are loose, chopping their way through time itself in their ravenous quest for cheese. And the chop will not stop.

Extraneum$14.99
Extraneum is an old-school, sci-fi single-player first person shooter with an emphasis on exploration and secret hunting. Fight your way through biohacked monstrosities and stop their progress before they take control of the entire world.

The Citadel$14.99
The Citadel is a brutal first person shooter, and a love letter to classic games such as Marathon, Doom and Wolfenstein 3d. Descend into the depths of a dark citadel, and fight through 6 Episodes and 30 levels of action packed with 6 challenging bosses. Go forth, Martyr.

Retro Blaster : Mech Madness #1$4.99
Retro Blaster: Mech Madness is a fast-paced FPS shooter, action, and platformer puzzles, created by one-man development Time Warp Game Studio using Unreal Engine. Combine a variety of weapons and skills, Jump higher and slam attack to more critical damage to take the enemy down!

SPICESHIFTER$24.99
Spiceshifter is a single-player game in 2.5D abstract graphics. The essence of the gameplay is to destroy hordes of enemies with the help of a wide variety of weapons, such as brass knuckles, magic or shotguns.

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.

Killing Sun / 抗日大刀队:日军总部$6.99
"Killing Sun" is an FPS game you do not want to miss if you are a fan of "Wolfenstein 3D". If you want to shoot devils, just play this game! No need to change magazines! No recoil! The operation is simple! Now! Take your Da Dao! Massacre in 27 levels of adrenaline surge! Let the devils all die!

1993 Space Machine$11.99
Space shooters never die. 1993 is a testament to that. 1993 is a classic shoot em up celebrating games like Gradius, R-Type and Life Force.

RETOOLED$14.99
RETOOLED is a fast-paced FPS where you will have to use all of your weapons and abilities to come out victorious. Fight a vast array of enemy classes in complex arenas. Will you resist, rebel and reclaim? or perish... Bunnyhop your way into the action and find out while wrecking some robots!

Veg out Crew FPS$4.99
You are Carro, the lone carrot on a mission to take back the Veg out World from all the moldy fruits and vegetables. Make sure your locked and loaded for some fun, old school, retro, shooter action.

Pitch Silent$1.99
The Earth has withered away. Guided by an angel in the dark. You must brave the underground of Eden to find all forms of creation to then journey to the center of the earth where a mystery awaits.

The Tome of All Tales$6.99
The Tome of All Tales is a minimalist old-school shooter that generates an unique adventure in an new setting every day.

Entropy$1.99
Shoot. Build. Upgrade. And shoot some more. Pixelated chaos on a monster-filled space station.

Nevedomo$0.99
Nevedomo is a dynamic arena first-person shooter with a Zetlex robot. Future. Two warring factions Bullets and Rockets participate in deadly competitions under the leadership of the Texer Force Corporation in order to capture the world's resources. Have a good fight!

Warhammer 40,000: Boltgun$21.99
Load up your Boltgun and unleash the awesome Space Marine arsenal to blast your way through an explosion of sprites, pixels and blood in a perfect blend of Warhammer 40,000, frenetic gameplay and the stylish visuals of 90’s retro shooters.

Terfenstein 3D$4.99
Terfenstein 3D is a short retro first-person shooter game about escaping a gender-fascist concentration camp. Unleash your pent-up fury upon the gender-critical tyrants with an arsenal of deadly weapons and tactics in cathartic bliss.

ParaSHOTical ARKtiviBeatings$4.99
Celebrate 10 years of Paranautical Activity with ALL of Code Avarice's FPS innovations packed into a single wacky package! Navigate through procedural levels and collect iconic Paranautical Activity items to power yourself up as you murder your friends in an Arkshot-like PVP multiplayer frenzy!

Calcium Contract$15.99
Calcium Contract is a fast-paced first-person shooter where you're on a mission to finish a contract that got out of hand. Learn to swiftly move around your enemies and master your arsenal as you fight your way toward the grand finale. Includes a unique score-attack mode in ever-changing arenas.

Bloc-Age: Path of the Oracle$24.99
A story driven fast paced action FPS with a retro twist.

Spectacular Sparky$14.99
A throwback to the golden age of white-gloved 16-bit video-game mascots, Spectacular Sparky is an action-packed platformer with wacky characters, explosive weapons and boss battles to treasure!

Halloween Forever$9.99
Something mysterious is happening in the pumpkin patch this Halloween! You control Pumpkin Man, a humanoid pumpkin thing animated by occult forces on a quest to discover why things are so creepy. And you vomit candy corn.

UfoPilot : The Phadt Menace - Steam Edition$4.99
A sci-fi retro side-scrolling shoot-em-up / rescue game.

Bashtronaut$9.99
Suit up, Bashtronaut, there’s been another invasion! Grab the nearest blunted weapon you can find and clock into this hack-and-bash adventure where you play as a seemingly ordinary exterminator in an extraordinary setting.

Breakout$5.99
Experience fast-paced shotgun carnage in this mini-roguelite boomer shooter like no other! Explore over 70 procedurally linked combat arenas as a metal army hellbent on destruction stand between you and freedom. Are you ready to take them on?

Meta Pong$0.99
IT'S DEMON TIME!

Distant Space$0.99
Distant Space are present the arcade game of cosmic fights in arcade style of the 80's, this is a game where you can control the spaceship and forced to destroy extraterrestrials, which are moving in the certain order.

OutgunFREE
Outgun is a multiplayer capture the flag game, with minimalist graphics in 2D top-view.

Anceder$12.99
Dive in the VR arcade shoot-them-up (shmup, shoot'em up, bullet hell). A lot of action is awaiting you. "Insert coin" and jump in the shmup !

Freedom! Do or Die$5.99
When terrorism threatens the world there is no need to send a bunch of iconic movie heroes back from the '80s. One under-funded over-powered mercenary is all that's needed to save the world in this epic run 'n' gun destruction-fest of a homage to Broforce!

Beyond Sunset$9.99
Cyberpunk first-person shooter with a rich story and RPG elements. You are Lucy, an enhanced street samurai searching for lost memories. Fight in large, open, interactive levels overtaken by yakuza, zombies, robots and bosses!

Ultra Mission™$2.99
Embark on a dangerous investigation in Ultra Mission™, the latest game by Gumbo Machine™. As an agent of the Stellar Exchange Commission, you must traverse the 20 dizzying levels within Otto Labs, each littered with powerful automatons and questionable experiments. This is going to be a blast!

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 !

Roley's Arcade Collection$5.99
Get 10 arcade games in 1 with Roley’s Arcade Collection. A reimagining of classic arcade games with a fresh new look.

Opalescence$2.99
The colorful top-down shooter/bullet-hell

Space Yugoslav 2D$4.99
Horizontal old school 2D shooter where you play as a bounty hunter named Nada. Survive another night at your very risky job, save the space non-alignment colonies from police raid and get back home at one piece alive! 7 levels, loads of new-retro-feel SHMUP fun!

Fingerbang: All Bullets Pointin'FREE
Fingerbang: All Bullets Pointin' is a fast-paced FPS inspired by both retro and modern FPS games. Fingerbang combines elements from each in order to create a mix of its own, with a scoring system added on top to gauge your performance through the different levels.

Trow's Space$5.99
Immerse yourself in a 2D pixel style game where you control a spaceship against enemy motherships. Your mission: destroy their towers with accurate shots. Face constant attacks and dodge asteroids, satellites and black holes. Beat levels to face more challenging enemies.

Bubble Blasters$9.99
Embark on a time-critical sci-fi challenge! Shoot giant bubble gums back to the machine before time runs out. Aim for a top spot on the leaderboards! Speed and precision are key in this thrilling arcade-style game!

Son of Perun Kharkiv$3.99
Son of Perun: Kharkiv is a first-person shooter in the setting of Kharkiv of the future and retrowawe.

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

Space Garbage$4.99
Do you like Tetris? Doesn't matter. Space Garbage is here to rotate Tetris 90 degrees on its head and add a little car to it. Blast and stack your way to the top of the leaderboard with this farm-to-table, indie, retro, solo, arcade... experience!

Blast in the Past$0.99
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.

RetroZen$1.99
Iconic rides, iconic vibes! Relive the soul of the '80s with retro supercars, synthwave tunes, and endless cruises in RetroZen!

Lober Lobe$4.99
Action packed, insane, brain centric, procedurally generated bullet hell shoot 'em up.

Cybershock: Future Parkour$2.99
Cybershock: Future Parkour is a runner game with outrun aesthetics in which you are an antivirus. Your mission is to destroy all the viruses on your computer before they destroy you. For this you must parkour through the different levels and avoid all the obstacles that stand in your way.

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.

RATTUS$0.99
Play as a Rattus, a psychic rat capable of summoning meteors and altering the fabric of time. He decides to fight some birds. Can you help him survive?

Lazer Rush Reloaded$1.99
SHOOT, CLIMB, SLASH, DASH, JUMP, SLIDE, AND RIDE the most intense rollercoaster of a MOVEMENT SHOOTER-PLATFORMER you’ve ever played. Experience challenging chaotic combat and high stakes platforming at the same time. Fight at top speed in Lazer Rush.