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.

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!

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.

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.

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!

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.

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.

Exodomia is a narrative-driven, action-adventure game set on the robotic world of Salakar V! In this fast-paced combat experience, you will encounter many dangerous creatures and enemies as you navigate a story of struggle and survival.

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.

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.

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

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.

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.

2040 World is a free-to-play third-person MMO action game with extraction-based gameplay. You play as a mercenary operator, remotely controlling synthetic avatars used by powerful transnational corporations to explore a vast artificial megastructure simply known as The Station.

Control your enemies. PARASITE is a fast-paced, third person shooter where you use your enemies as weapons. Fast-jump between foes during combat and upgrade your sync with them to level their abilities. Escape and destroy the ruling AI.

Autothysis is a first-person tower defense game where strategy meets precision. Deploy turrets, manage resources, and fight swarms of insectoid enemies. Target weak points to shatter foes while upgrading defenses to survive escalating waves. Can you withstand the oncoming horde?

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

FPS single-player de ciencia ficción con supervivencia y exploración interdimensional, donde combatís criaturas anómalas y luchás por sobrevivir en entornos distorsionados.

Tank, action and shooting game, where does it start your new adventure in a world of science fiction and interplanetary wars...