Top similar games like Us Against Aliens:

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.

Play the classic STAR WARS™ Battlefront games, online and offline in this definitive collection.

Invasion sequel. Our story continues where it left off. You are trying to find your father, who went on a mission to Mars years ago and was never heard from again.

Freeman: The Resistance - is a single-player sci-fi adventure that seamlessly blends spaceship combat and planetary exploration. Unravel the mysteries of a richly crafted open world. Engage in thrilling battles, gather valuable loot and RPG elements to enhance your journey.

"Heroes Stand Tall: M.E.T.A" is a simple first-person arena shooter built using Unreal Engine and marketplace assets. Created as a personal project, it was developed to learn the full process of making and releasing a game on Steam.

Scionide is a fast-paced sci-fi shooter set in 2268 AD, where the Amalgamate Republic fights for survival against the Scion Empire. Battle in single-player, PvP, and co-op PvE across dynamic maps.

Red Faction: Armageddon Path to War includes 4 new missions, 2 unlockable items and 10 new achievements!

A frantic third-person Team Deathmatch arena shooter. Flank your enemies using hidden teleporters, tunnels, and floating islands. First team to 30 takes the glory. Get your loadout ready, engage in intense matches, and conquer the stars!

Gator Hucker is a fast-paced brawler where you craft your own unique playstyle! You are alien alligators with wacky abilities locked in battle, in teams or a chaotic free-for-all! Huck into the arena with the help of cybernetically enhanced gorillas and cause chaos for glory and entertainment!

Sci fi survival multiplayer based game, this game will be an ongoing development.

Space Pirate Captain McCallery has Crash Landed on an alien planet! Explore a strange and hostile alien world in this Low-Poly 3D Action-Adventure game.

Sharks of Mars: Prologue begins the story of an unlikely hero (you) who finds that little green men are the least of our worries on the red planet. Explore the Martian landscape, solve puzzles, and fight for your survival!

A 3-10 player space station scavenging social deduction game. Will you be able to meet quota with your team? Or will you do everything in your power to sabotage them as the traitor?

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.

Supplice is a stylish throwback shooter inspired by the mid-90s FPS glory days and the legendary Doom modding community. Mixing the retro stylings of 90s era shooters with colorful graphics and frantic gameplay, it creates an experience that's ever so familiar but also exciting and fresh.

Klostyn is a sci-fi shooter that stays true to the late-'90s FPS style. The protagonist fights alien creatures and space pirates on a distant planet.

EXOMECHA™ is a brand-new multiplayer shooter that takes place in OMECHA, an untouched planet with exotic environments. It offers you a breathtaking sci-fi gaming experience with its infantry, vehicular and mecha combat.

Aiming is uneasy, movements are slow, resources are hard to earn. Stop farming infinite vegetables, try to acquire some more jigowatts in empty space, where no one can hear your scream. Moon is a harsh mistress.

Enter a cursed forest to rescue your missing friend who was taken by the legendary Wewe Gombel. Survive terrifying supernatural encounters, solve puzzles, and uncover the dark secrets hidden within the woods.

Platform infinity in a loop while shooting inwards at the boss in the center! With one health and only bosses inspired by the greatest boss fights for the 2000s, every moment is on edge, electric, do or die action!

0N35H07 (ONESHOT) - arcade first/third person 3d shooter about balls that shoot lasers at each others. It's free game, and it's source code is open to view and change. Multiplayer, decent bot AI, character customization, amazing soundtrack.

The ORIGINAL Mobile Multiplayer Shooting Game comes to PC! Compete with your friends in vibrant sci-fi maps across multiple game modes. Choose from 11 unique classes, with thousands of loadout combinations to master. We’ll see you on the battlefield in 2026!

FUBG is a Multiplayer Shooter Game by GameX with Seven Different Game modes. 1. Team Death Match 2. Capture the Flag 3. Conquest 4. RUSH 5. Kill Confirmed 6. Free For All And 7. Search & Destroy. Player can Play strategic battles across diverse maps and various combat styles to claim victory.

Open Tournament is a fast-paced, free-to-play shooter that brings the essence of classic competitive FPS games into modern multiplayer action! Experience intense multiplayer gameplay with fluid movement, innovative weapons, and a variety of dynamic maps & modes.

Defracted - The world is set in a fictional sci-fi realm where 2 teams are at war with each other over prosperity in a virtual reality game created by an alien civilization.

Lock and load into the Starship Troopers universe and join the Mobile Infantry in the most realistic depiction of war ever made! Experience an original story in this action-packed, first-person retro shooter. Would you like to know more?

The new flames of war have ignited, and you will lead the mobile infantry regiment to defend the position. At that time, these damn Zergs will come from all directions, but I believe that under the leadership of your heroic lieutenant, you and your subordinates can definitely defeat these damn Zergs

Welcome to NEXUS, a hostile world where survival is only the beginning. In this open-world co-op PvE shooter, you’ll join a team of sci-fi mercenaries tasked with securing resources, crafting powerful gear, and pushing back relentless android swarms that threaten humanity’s colonization efforts.

Frontland is an arena-based action game set in a gritty, 1980s-inspired futuristic world. Players fight to the death to pay off debts to the mega-corporation Death by Debt. Navigate neon-lit arenas, master combat skills, and survive high-stakes battles in this thrilling, retro-futuristic experience.

Exoprimal is an online, team-based action game that pits humanity's cutting-edge exosuit technology against history's most ferocious beasts – dinosaurs.​​