
Alien Attack
You are a space trooper. Your crew finished the cleaning mission and left you alone by accident. Now you are surrounded by aliens.
Miss the fast-paced and cinematic pull of Cardinal Conclave? Browse these games for your next favorite.
An extraterrestrial organism threatens deep space exploration missions! Only trained personnel working as a team can eliminate these infestations. But, the corporation financing the space endeavor has a private mail for you: Cold hard cash for the alien alive! Which side will you choose?
Also in Co-op · Fast-paced, Competitive, Replayable
A sci-fi roguelike auto-battler. Build a powerful intergalactic starship by interlocking different technologies, then battle through a galaxy populated with other players' creations.
Competitive, Replayable
You are a space trooper. Your crew finished the cleaning mission and left you alone by accident. Now you are surrounded by aliens. Persist them as long as you can.
Also in Co-op · Fast-paced, Replayable, Tense
Four big-eyed aliens sit on the Moon and play card games where the loser's head inflates until it pops. Bluff, lie, stack the deck and vote out the impostor, all in first person with friends online. Silly, tense and quick to learn, it turns a quiet evening into a table full of liars.
Also in Co-op · Competitive, Replayable
In this base-defense deck-building card game you and your teammates will have to work together to survive the continuous onslaught of powerful alien threats and horrors!
Also in Co-op · Replayable, Tense
This game is fully built around Steam play together. You and 3 other friends can control a star ship together and fight back enemies that you counter! Different star ships to control, each having their different movement and weapons, and some will have abilities.
Fast-paced, Competitive, Tense
Snow Plows vs Aliens: 4 player, local co-op chaos
Also in Co-op · Fast-paced, Competitive, Replayable
Fly the famed Platypus fighter through a fantastic landscape of carefully molded clay to protect inhabitants of Mungola from the Collosatropolians! Collect power-ups and bonus stars to give your Platypus the boost you need. Every level of this gorgeous arcade challenge bursts with original fun that's perfect for gamers of all ages.
Also in Co-op · Fast-paced, Retro
Calamari Clash is a multiplayer versus game which takes you into the role of a Calamartian who crashed on an unknown planet along with its companions. Dash it out against each other to charge the spaceship’s battery and escape. Only one can escape… who will it be?
Fast-paced, Competitive, Replayable
It's the future! And humanity is, predictably, under attack by extraterrestrial forces. Lucky for us we have an experimental ship that's never before been flown that will surely...uh, possibly...well, implausibly be able to win the war! All we need now is a pilot or two.
Also in Co-op · Fast-paced, Replayable, Tense
Use Nukes, Electricity, Heat Rays and powerful Minions in this wave-based first person shooter providing endless hours of Ghost-slaying entertainment, solo or Co-Op. Only Ghosts stand in the way of your invasion of Earth.
Also in Co-op · Fast-paced, Replayable, Tense
In the game, an alien named Alian will plunge into a world of Halloween full of dangers.
Fast-paced, Retro

You are a space trooper. Your crew finished the cleaning mission and left you alone by accident. Now you are surrounded by aliens.

This game is fully built around Steam play together. You and 3 other friends can control a star ship together and fight back enemies that you counter!

Aliens Invaded Our Planet is a Multiplayer / CO-OP (Up to 6P) FPS & Arcade Style Action game, the game is about alien invasion in 1900s Richalley…

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A party game / arena fighter where balding porcupines with only a single quill left fight to the death for honour, glory, and their enemies' skulls!

It is your job to save the planet from its decay. Only you can prevent an extraterrestrial species from taking over all of humankind. How?

The vast continent-spanning city of Collosatropolis has finally reached the limits of its expansion. Tall buildings cover every available space.

Eternal Destiny is an epic card game inspired by myths, legends, and H.P. Lovecraft, featuring 500+ cards with delightful animation and voice acting!

Lonefield Evacuation Survivor is a... survivor in which you play as a ship facing an alien incursion.

Break through unlimited waves of enemies and fight unpredictable bosses!

MPAliens - 2D Arena Platformer. It's a local party game with intense PVP matches, hardest COOP missions and different Bosses on different maps.

Can you survive the alien onslaught? Gamers across the world will now have a chance to play the next chapter in this high-budget, high-quality series.

Four big-eyed aliens sit on the Moon and play card games where the loser's head inflates until it pops.

Share the love and die trying! KarmaZoo is a joyful, altruistic, cooperative platformer where up to 10 random players help each other with the…

Use Nukes, Electricity, Heat Rays and powerful Minions in this wave-based first person shooter providing endless hours of Ghost-slaying…

Team up as klowns or humans in a horror match where hiding, scavenging and squeaky shoes decide who leaves the cove alive.

CounterAttack: Uprising is a side scrolling space shooter (shmup).

Rid a post-apocalyptic Earth of alien invaders with over-the-top weaponry, solo or with a squad of four.

Sneak through a contaminated zone with your squad, finish the mission and reach extraction before the aliens overwhelm you.

SQUIDS FROM SPACE is an 8v8, team-based PvP top-down shooter where humans and the sinister Squid aliens wage war for the future of the Earth!

Livelock is a co-operative top-down shooter for solo players or up to three players online.

The vast continent-spanning city of Collosatropolis has finally reached the limits of its expansion. Tall buildings cover every available space.

You are a space trooper. Your crew finished the cleaning mission and left you alone by accident. Now you are surrounded by aliens.

Can you deal with unrelenting disaster and hold your ship together long enough to destroy the enemy invaders?

Early 2000's inspired 1st/3rd-person shooter, with vehicles, ships, jet packs, multiple foot‑soldier classes, space battles, and so much more.

Slide, jump and shoot in 8 directions in this explosive Run 'n Gun for up to 3 players!

A shooter game where you fight evil across the solar system and collect psychic cat cards. Use them to conquer land on planets.

A sci-fi roguelike auto-battler. Build a powerful intergalactic starship by interlocking different technologies, then battle through a galaxy…

Go Ape Ship! is a frantic co-op multiplayer game for one to eight players.

A bizarre music band named Genokids is rocking one of their best concerts to date when The Infinite Empire of Zenodia decides to invade Earth and…

Local VR+PC horror: as a VR player, escape an underground facility full of giant alien monkeys.

Lonefield Evacuation Survivor is a... survivor in which you play as a ship facing an alien incursion.

Grab your friends and blast through alien hordes in this side-scrolling bullet hell shooter with up to four-player PvE co-op.

Save TEXAS from terrorists, aliens, and zombies... oh my God! 🙀 . Are you ready for the world’s first feline-powered third-person shooter?

Team up as klowns or humans in a horror match where hiding, scavenging and squeaky shoes decide who leaves the cove alive.

Share the love and die trying! KarmaZoo is a joyful, altruistic, cooperative platformer where up to 10 random players help each other with the…