Civil Warfare
After an alien invasion of Earth, the main character gets trapped in a network of alien portals and needs to navigate back home, destroying all…
50% of 2 Steam reviews are positive$4.99
Co-op games like Kill Invaders
If Kill Invaders scratched a fast-paced and competitive itch for you, keep reading. You might settle into these co-op games easily. Many of them are fun to share with friends.
Civil Warfare
After an alien invasion of Earth, the main character gets trapped in a network of alien portals and needs to navigate back home, destroying all kinds of monsters along the way.
Fast-paced, Competitive, Tense
50% of 2 Steam reviews are positive$4.99ALIENS INVADED OUR PLANET
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 Town. Shoot and run for your life against the aliens!
Fast-paced, Competitive, Tense
64% of 55 Steam reviews are positive$0.99The God's Chain
Finally the day came when we found our GOD.Human Beings are an experiment done by them.The human beings are evolving and have become one of the greatest powers in the universe which is becoming a great problem for other colonies in the universe.So our god decides to end the experiment but now human beings will fight for their existence.
Fast-paced, Competitive, Chaotic
62% of 55 Steam reviews are positive$4.99Assault On Proxima
Lock and load with Strike Force Delta in this action-packed sci-fi FPS! Play solo or team up to blast through hordes of Gacrux alien invaders, save humanity’s colonies, and dominate intense PvP showdowns. Gear up, soldier, and get ready to lead the Assault on Proxima!
Fast-paced, Tense
81% of 32 Steam reviews are positive$9.99Multiplayer Military
Multiplayer Military - Aliens are invading the Military Base. The World needs Your Help. You and Your team of Elite Soldiers must take out ALL Aliens and Save the Planet.
Fast-paced, Competitive, Tense
64% of 11 Steam reviews are positive$0.99Earthfall
Earthfall is a four-player co-op shooter about holding the line against an alien invasion in the Pacific Northwest. You and your co-op friends push through 15 story levels, set up barricades and turrets, and survive hordes that change every run. Straightforward teamwork, big guns, lots of drones to drop.
Fast-paced, Tense, Chaotic
64% of 1,574 Steam reviews are positive$19.99UFO : Brawlers from Beyond
"UFO : Brawlers from Beyond"! A fast action multiplayer shooter set during an intergalactic televised tournament where EARTH has been chosen as the BATTLEFIELD!
Fast-paced, Competitive, Chaotic
100% of 1 Steam reviews are positive$9.99Aliens vs. Ghosts
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.
Fast-paced, Tense, Chaotic
89% of 604 Steam reviews are positivePlayers online now: 2$7.49Interstellar Marines
UPDATE 28 AVAILABLE - Interstellar Marines is an immersive tactical sci-fi First Person Simulator in the making, offering a unique blend of tactical gameplay, dynamic environments and non-scripted AI. Play Singleplayer or Co-op/PvP on servers around the world.
Competitive, Tense
51% of 4,282 Steam reviews are positive$9.99Walkover
It is WAR!Team up with your comrades to stand against the pesky aliens.
Fast-paced, Competitive, Chaotic
64% of 139 Steam reviews are positiveFreeUnfortunate Spacemen
A shapeshifting monster hides among your crew on a failing outpost, and someone brought guns. Team up with co-op friends to finish objectives and call for rescue, accuse each other over proximity chat, then run when the teeth come out. Best with a full lobby of friends.
Fast-paced, Competitive, Tense
85% of 7,560 Steam reviews are positivePlayers online now: 17FreeMars Battle
This is a mars battle simulator where you fight against waves of alien bugs to decide who controls mars. Its a massive online multplayer game where you can create rooms or rooms rooms.
Fast-paced, Competitive, Chaotic
$0.99
Cheaper than Kill Invaders
ALIENS INVADED OUR PLANET
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…
64% of 55 Steam reviews are positive$0.99
The God's Chain
Finally the day came when we found our GOD.Human Beings are an experiment done by them.The human beings are evolving and have become one of the…
62% of 55 Steam reviews are positive$4.99
Multiplayer Military
Multiplayer Military - Aliens are invading the Military Base. The World needs Your Help.
64% of 11 Steam reviews are positive$0.99
Aliens vs. Ghosts
Use Nukes, Electricity, Heat Rays and powerful Minions in this wave-based first person shooter providing endless hours of Ghost-slaying…
89% of 604 Steam reviews are positivePlayers online now: 2$7.49
Mars Battle
This is a mars battle simulator where you fight against waves of alien bugs to decide who controls mars.
$0.99
Chicken Invaders 5
Chickens are blocking out the sun to freeze Earth, and only you and your co-op friends can stop them.
97% of 942 Steam reviews are positivePlayers online now: 13$5.99
Xatrom Command
Team up and shoot down waves of invading aliens. Single player or multiplayer top-down shooting action
100% of 2 Steam reviews are positive$5.99
Forbidden Ingress
Our world is in danger! Grab your gun and stop these uninvited guests!
74% of 226 Steam reviews are positive$4.99
DotStrike
DotStrike is a 3D online shooter in which alien invaders in the form of colored spheres fight each other in a seaport.
75% of 4 Steam reviews are positive$7.99
SIK Space Invader Kreature
SIK - Space Invader Kreature is a multiplayer shooter, a frantic experience of eliminating the hordes of invaders.
33% of 3 Steam reviews are positive$6.99
Rise:30 Minutes to Extinction
A fast paced third person shooter. Race against the clock alone or with friends across multiple maps and game modes to defeat the alien horde and…
100% of 4 Steam reviews are positive$0.99
Hidden gems like Kill Invaders
Aliens vs. Ghosts
Use Nukes, Electricity, Heat Rays and powerful Minions in this wave-based first person shooter providing endless hours of Ghost-slaying…
89% of 604 Steam reviews are positivePlayers online now: 2$7.49
Chicken Invaders Universe
You are a new UHF recruit holding the line against the revenge-driven Henpire, and co-op friends can fly those missions with you.
91% of 3,861 Steam reviews are positivePlayers online now: 41Free
Killer Klowns From Outer Space: The Game
Three of your co-op friends become Killer Klowns hunting Crescent Cove with zany weapons and strange powers, while the other seven of you grab loot…
73% of 3,411 Steam reviews are positivePlayers online now: 13$39.99
From Space
From Space is a top-down co-op shooter for squads of up to four, built around blasting waves of pink aliens with rocket launchers, miniguns and…
67% of 1,430 Steam reviews are positive$14.99
Unfortunate Spacemen
A shapeshifting monster hides among your crew on a failing outpost, and someone brought guns.
85% of 7,560 Steam reviews are positivePlayers online now: 17Free
EARTH DEFENSE FORCE 5
Giant ants flood the street, a teammate calls in an airstrike, and half the block goes with them.
93% of 9,420 Steam reviews are positivePlayers online now: 207$59.99
Tom Clancy’s Rainbow Six® Extraction
Grab two co-op friends and push into alien-held zones together: scout quietly, clear nests, finish objectives, then decide whether to bank the win…
66% of 2,896 Steam reviews are positivePlayers online now: 17$39.99
Forbidden Ingress
Our world is in danger! Grab your gun and stop these uninvited guests!
74% of 226 Steam reviews are positive$4.99
Aliens: Fireteam Elite
Aliens: Fireteam Elite is a co-op third-person survival shooter where you and two co-op friends hold the line against waves of Xenomorphs on planet…
80% of 21,776 Steam reviews are positivePlayers online now: 210$29.99
Chicken Invaders 5
Chickens are blocking out the sun to freeze Earth, and only you and your co-op friends can stop them.
97% of 942 Steam reviews are positivePlayers online now: 13$5.99
M.A.R.S.
M.A.R.S. is a third-person shooter built for co-op friends who want quick rounds with plenty to shoot.
63% of 1,170 Steam reviews are positivePlayers online now: 40Free
EARTH DEFENSE FORCE 4.1 The Shadow of New Despair
Giant ants, giant spiders, giant robots, and you with co-op friends holding the line.
95% of 7,807 Steam reviews are positivePlayers online now: 82$19.99
Newest co-op games like Kill Invaders
Ghost Battalion
Early 2000's inspired 1st/3rd-person shooter, with vehicles, ships, jet packs, multiple foot‑soldier classes, space battles, and so much more.
80% of 5 Steam reviews are positive$12.34
Legend Battles
Squad up for extraction runs across huge maps, where you take missions, fight five AI factions plus rival squads, grab loot, and get out together.
85% of 497 Steam reviews are positivePlayers online now: 14Free
Assault On Proxima
Lock and load with Strike Force Delta in this action-packed sci-fi FPS!
81% of 32 Steam reviews are positive$9.99
Starship Troopers: Extermination
Starship Troopers: Extermination is an up to 16-player co-op FPS where you and your co-op friends join the Deep Space Vanguard, grab Morita rifles…
80% of 29,801 Steam reviews are positivePlayers online now: 333$29.99
MT Force Aliens Uprising
Dive into the heart-pounding action as MT Force, an elite government unit racing against time to unravel the mysteries of enigmatic anomalies.
80% of 10 Steam reviews are positive$0.99
EARTH DEFENSE FORCE 6
EARTH DEFENSE FORCE 6 is a third-person shooter about holding the line against giant insects, robots, UFOs and other alien forces with up to four…
69% of 6,282 Steam reviews are positivePlayers online now: 350$59.99
Gemini: Binary Conflict
‘Gemini: Binary Conflict’ is a multiplayer, class based, first person shooter set in the midst of an interplanetary war.
76% of 68 Steam reviews are positiveFree
Killer Klowns From Outer Space: The Game
Three of your co-op friends become Killer Klowns hunting Crescent Cove with zany weapons and strange powers, while the other seven of you grab loot…
73% of 3,411 Steam reviews are positivePlayers online now: 13$39.99
FreeInfantry
Isometric. Massively Multiplayer. Capture The Flag. Skirmish. Bug Hunt. And more.
78% of 165 Steam reviews are positivePlayers online now: 3Free
Xatrom Command
Team up and shoot down waves of invading aliens. Single player or multiplayer top-down shooting action
100% of 2 Steam reviews are positive$5.99
Alien Hominid Invasion
Invade Earth with up to three co-op friends as squeaky little aliens, blasting agents, stealing intel, and mutating mid-run.
88% of 1,571 Steam reviews are positivePlayers online now: 5$19.99
Fast & Blast
multiplayer survival mode story - you live in universe where boxes live but project balls got wild project balls escaped from lab and started…
84% of 25 Steam reviews are positiveFree