Alien Exterminators
Grab your gear, take a contract, and exterminate hostile alien infestations with up to three friends across unpredictable planets full of chaos, danger, and bad workplace conditions.
The top results based on the latest update are Space Jammed [Score: 1.3], Stellar Valkyrie [Score: 1.2] and Brutal Cube [Score: 1.1] The top rated games you can find here are Species: Unknown [SteamPeek Rating: 8.2] ranked #35, Starship Troopers: Extermination [SteamPeek Rating: 8.2] ranked #32 and Serious Sam 3: BFE [SteamPeek Rating: 7.5] ranked #18 Also don't forget to check the newest releases Sketchy's Contract [Release date: 2026-07-15] ranked #25, Burger Bots Inc. [Release date: 2026-06-17] ranked #34 and Species: Unknown [Release date: 2025-10-23] ranked #35 While it is tempting to play with the newest and the best, there might be some other gems in the results, like Serious Sam HD: The First Encounter [SteamPeek Rating: 7.1] ranked #13, Serious Sam II [SteamPeek Rating: 7.1] ranked #15 and Serious Sam 3: BFE [SteamPeek Rating: 7.5] ranked #18.
Grab your gear, take a contract, and exterminate hostile alien infestations with up to three friends across unpredictable planets full of chaos, danger, and bad workplace conditions.
Space Jammed is a co-op (up to 4 players) sci-fi action horror game about smuggling cargo through a chaotic wormhole. Keep your spaceship barely functioning while hordes of aliens tear it apart and deliver the goods in one piece… or whatever’s left of them.
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.
Brutal Cube is a CO-OP multiplayer action game where you explore dangerous and diverse regions. Gather resources, fight enemies, and work with your team—or act selfishly and turn against them.
Fullsenders is a 1-4 player co-op movement shooter based in an AI-overrun world... Master fast, fluid movement and advanced shooting to destroy take back the world. Gather resources, complete objectives and extract to level up and upgrade your Fullsender... Just do it before night time comes.
Serious Sam HD: The Second Encounter is a visually upgraded and fully Steam supported remake of the original high-adrenaline single-play and 16-player co-operative arcade-action FPS and Gamespot's Game of the Month!
The Goblins have been enslaved too long under the Ratfolk. Now comes the time to strike back and DESTROY them once and for all, but don't get too cocky, there's no telling what they might have in store for you. Use your Goblin Skills and Charm in this Action-Adventure, Roguelite.
Enter the sci-fi clash of this hide-and-seek game. Play as one of four mighty Hunters armed with high-tech gadgets to track down elusive Slugs. Or slip into the slimy skin of up to twelve Slugs, mastering sneaky and ingenious abilities, while hiding by morphing into various objects.
Enter Pantheon, a futuristic city swallowed by darkness and ruled by a rogue AI. Team up with up to 4 players and survive an adaptive pursuer that learns from every mistake. Complete the mission, uncover Minerva’s secrets, and find a way out before the city consumes you.
Replicore is a 1-4 player co-op shooter where you transform into the spherical Core: roll through tunnels, dash between cover, and launch your teammates at enemy robots for explosive takedowns. The shapeshift shooter with cooperative mobility.
You & your friends are the deadliest killers in the galaxy – the US Colonial Marines. It’s up to you to not just survive, but wipe out the Xeno infestation.
Enter the ultimate penguin showdown! Battle in fast-paced multiplayer FPS matches with outrageous weapons, ridiculous gadgets, and explosive action. Customize your penguin, master unique abilities, and outwit your opponents in chaotic battles where anything can happen.
An online co-op adventure game about aliens making off with gadgets created using extraterrestrial technology. The anti-alien alarm can't stop all of us! Use physics-based objects to create havoc and extract with these powerful gadgets.
Serious Sam HD: The First Encounter is a visually upgraded and fully Steam supported remake version of the original high-adrenaline single-play and 16-player co-operative arcade-action FPS which was Gamespot's Game of the Year 2001 and which scored overall of 87% on Metacritic!
Physics-driven co-op for one to four players. Take over Ghalyan's Hookah Lounge on a space station and reopen it. Pack the bowl, light the coals, serve the aliens, and watch it all float when the gravity cuts out.
Serious Sam II is a shot of adrenaline to the hearts of first-person shooter fans across the world. This is serious!
Put on your thermos bags and head outside with your friends. You will have to deliver food to the aliens and make sure that the last company on Earth does not close down.
A multiplayer adventure set in the depths of space. Unravel mysteries, strategize for survival, and explore the unknown in this captivating cosmic escapade.
Serious Sam 3: BFE is a prequel to the original indie fast action FPS and Game of the Year sensation - Serious Sam: The First Encounter!
All units, heed my orders! The enemy is approaching! Call for reinforcements! Set up turrets! And someone bring me a new gun! And quickly! Now, all fighters, time is short, everyone to Kronos! Go, go, go!
Dive into massive, open alien environments to rescue, recover, and battle in the name of Humanity and profit. Select a mission, customize your equipment, drop, strike, and evac to space (if you can). Enjoy the physics based 1st person tactical shooter in VR or 2D, single player or in 4 player co-op.
The package is everything, even when the package is your friend. Crew an automated delivery train through hostile space in 1-4 player co-op horror. Keep the engine alive, keep Chomp fed, and when the company demands it, box up a colleague and ship them with the cargo.
From the team that brought you Aleph One, the classic sci-fi FPS Marathon Infinity from Bungie on Mac revived for modern hardware by the fan community.
PINZ is a co-op 1-4 player roguelike FPS about penguins saving eggs across the universe. Collect pebbles for the statue, rack up combos, hurl concoctions at friends and foes, and be sure to give your buddy a hearty slap right before the boss.
From the team that brought you Aleph One, the classic sci-fi FPS Marathon 2: Durandal from Bungie on Mac revived for modern hardware by the fan community.
A 1-8 player co-op sci-fi looter horror game that takes place on a mysterious asteroid belt where players must complete contracts by traveling to exotic planets to kill creatures, find loot, and/or farm planetary materials that they must return to an ominous figure named Sketchy.
Voidseekers is a 1-4 player co-op horror FPS. Shoot, salvage, and survive as you explore corrupted ships in deep space. Get in, take what you can, and destroy the ship to contain the breach, but beware the horrors that seek in the void.
From the team that brought you Aleph One, the classic sci-fi FPS Marathon from Bungie on Mac revived for modern hardware by the fan community.
A small little game where you and your friends have a once in a lifetime opportunity: Hunt BigFool. BigFool is an elusive, fearsome creature of the night from unknown origins. Set in the Crimblr Forest, explore various points of interest, keep an eye and an ear out, and take down this iconic beast.
Cut through fungal aliens in this hyper-customizable, mission based looter shooter. Hundreds of hand-crafted upgrades, 4-player co-op, and a little roach man. What’s not to love?
Co-op social chaos where you signed up to crew a barely-functional spaceship for a faceless megacorporation, with up to 5 friends. Keep a fragile spaceship alive while everything falls apart at once.
UFOBIA is a cooperative horror game for 1 to 4 players who need to solve puzzles and face beings from another planet.
Starship Troopers: Extermination is a 16-player co-op FPS that puts you on the far-off frontlines of an all-out battle against the Bugs! Squad up, grab your rifle, and do your part as an elite Deep Space Vanguard Trooper to take back planets from the Arachnid threat!
TaskFall is a co-op physics-based destruction game where you and your friends are assigned missions from the Citadel, survive deadly disasters, complete high-risk tasks, extract safely, buy new items, and smash through chaotic environments. Do you have what it takes to survive ?
An online co-op burger flipping game with scary and strange customers that you shouldn't anger.
Species: Unknown is a 1 to 4 players co-op survival horror. Complete high-risk missions aboard an abandoned ship while being hunted by an unknown creature. Survive and upgrade your gear to face each new threat that lurks in the dark.
A 4 player co-op horror where you answer distress calls and board spaceships in search of survivors.
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