Games like Alien Syndrome

"Super Mutant Alien Assault" is a challenging arcade-style platformer where you fend off alien attacks on a spaceship. With rapid fire levels and randomized objectives, enemies, and vending machines, each playthrough is unique. Unlock and master a variety of weapons, abilities, and perks to survive and save humanity across three galaxies.

Face the end in a high-intensity cinematic sci-fi shooter. Engage a colossal threat, rescue civilians, and survive relentless enemy waves in a city collapsing under the weight of the unknown. Your squad is the last line between humanity and total annihilation.

In "Abiotic Factor," players navigate a chaotic, otherworldly research lab after a containment breach, fighting off hostile anomalous entities and the Order, a militaristic sect seeking to seize powerful artifacts. As a GATE employee, it's up to you to secure the lab, protect survivors, and uncover the truth behind the catastrophe. With a mix of FPS action and adventurous exploration, prepare for a thrilling, immersive experience.

"Aqua Kitty: Milk Mine Defender" is a fast-paced, retro-style shoot-em-up game. Players protect a school of cat milkmen from robotic enemies while they extract milk from the ocean floor. With upgradeable weapons, power-ups, and multiple levels, it's a challenging and fun experience for fans of classic arcade games.

"Arcade Mayhem Juanito" is a frenetic arcade-style game where players control Juanito, a mischievous boy wreaking havoc in various settings. Use an array of weapons and power-ups to cause maximum destruction and mayhem while avoiding obstacles and enemies. With its fast-paced gameplay and humorous tone, "Arcade Mayhem Juanito" provides an exciting and lighthearted experience.

"Super Mega Space Blaster Special Turbo" is a challenging retro-style space shooter with numerous challenges and unlockables. Players can blast through hordes of enemies across different game modes, with a variety of ships and upgrades to unlock. The game is designed for those seeking a core shooting experience with a focus on gameplay rather than story or high-end graphics.

Shadowgrounds is a Science Fiction Shooter game that offers a thrilling experience with its explosive combat sequences, innovative weapon upgrade system, and intriguing storyline. The game supports single-player mode, as well as 2-player co-op, either on a single computer or multi-player. The game's top-down perspective and audiovisual fireworks add to the excitement, making it a unique entry in the action genre. The single-computer co-op play offers a great feature for players to team up and enjoy the game together.

"The Anacrusis is a 1-8 player sci-fi co-op FPS from the lead of Left 4 Dead, where you fight against endless alien hordes using a variety of futuristic weapons. With Steam Workshop support, enjoy new campaigns, holdout maps, skins, and emotes, or play as the aliens in PVP Versus mode. Battle the alien menace and protect your friends to survive!"

"Expendable" is a Science Fiction Shooter game that offers various gameplay options such as single-player, 2-player co-op, and multiplayer. Players control super-soldiers, developed in the "Millennium Soldier" project, on a mission to defeat a hostile alien race and save the galaxy. The game features exciting shoot-em-up gameplay, variety of weapons, and intense battles against monsters, robots and boss aliens. Overall, it's a highly entertaining and action-packed game.

"Ripout is a Co-Op horror shooter with excellent graphics and mechanics, allowing 2 players to fight through mutant-infested spaceships, collect loot, and customize characters in search of humanity's last bastion. Engage in high variety of reconfigurable monster battles, with a derelict ship exploration in single-player or small teams. The game's phenomenal atmosphere and grinding opportunities ensure hours of entertainment."