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Alien Swarm
Alien Swarm is a freeware top-down shooter video game by Valve Corporation.
Today's Top Maps
2 Maps Co-Op Campaign
09.30.14 Feedback 1
Your mission was to find and destroy a secret alien lab. Now you have crash l... More >
Author BioHazard
Game Alien Swarm

Rating
2 Cold Catwalks
Co-Op
03.05.14 Feedback 0
An alien swarm map for everyone to enjoy! Hope you like it. More >
Author hemuuuli
Game Alien Swarm

Rating
3 Dead City
Co-Op
03.06.14 Feedback 0
An epic bug hunt featuring a unique blend of co-op play and squad-level tacti... More >
Author Daniel101
Game Alien Swarm

Rating
4 Drone Lab
Co-Op
03.06.14 Feedback 0
This map/campaign is in the early stages, and I thought that I should release... More >
Author XionOfChaos
Game Alien Swarm

Rating
5 The Dead Temple
5 Maps Co-Op Campaign
09.26.14 Feedback 0
There are five missions in this Campaign. All the missions have specific obj... More >
Author Xacktar
Game Alien Swarm

Rating
6 Lost Cause
Holdout
09.26.14 Feedback 0
Hold off against the swarm in this survival map. You have to keep alive for a... More >
Author daniel10166
Game Alien Swarm

Rating
7 survival_outpost_snow
Holdout
09.26.14 Feedback 0
This is a survival map You have to hold out in an outpost for 10 minutes and ... More >
Author Asus
Game Alien Swarm

Rating
8 Holdout
Holdout
09.26.14 Feedback 0
A quick survival map I created...and yes, it was significantly edited from it... More >
Author Echo
Game Alien Swarm

Rating
9 Tears for Tarnor
3 Maps Co-Op Campaign
09.29.14 Feedback 0
Welcome to the harsh planet of Tarnor. A nearly airless rock circling an anci... More >
Author Ezekel
Game Alien Swarm

Rating
10 Outpost 5
Co-Op
09.26.14 Feedback 0
This is a Tilegen but I tried to add enough detail and change it up enough to... More >
Author larrybrains
Game Alien Swarm

Rating
Today's Top Mods
Marines
09.26.14 Feedback 0
1_ Extract the .ZIP file. 2_ Move the robot-1.vpk file to ":\Program files\St... More >
Author lucas rojas
Game Alien Swarm

Rating
2 Nepumax' Colorful Marines
Marines
09.26.14 Feedback 0
This pack includes recolored marine skins for Alien Swarm. * INSTALL INSTRUC... More >
Author Nepumax
Game Alien Swarm

Rating
Alien Swarm
Installing Alien Swarm Add-ons [b]Step 1: Download the add-on.[/b] All downloads are in .zip format. (You need to open the .zip archive to access the .vpk file.) If you can not open or extract the .zip/.rar file, download and install winrar for free. [b]Step 2: Install the add-on.[/b] Copy the .vpk to your Alien Swarm add-on directory. If this folder does not exist, create this folder. \Steam\...
08/30/15
1,742 views
08/30/15
Installing Alien Swarm Add-ons [b]Step 1: Download the add-on.[/b] All downloads are in .zip format. (You need to open the .zip archive to access t...
2 Maps Co-Op Campaign
09.30.14 Feedback 1
Your mission was to find and destroy a secret alien lab. Now you have crash l... More >
Author BioHazard
Game Alien Swarm

Rating
39MB Download
2 Maps
2 Maps Co-Op Campaign
09.30.14 Feedback 1
Your mission was to find and destroy a secret alien lab. Now you have crash l... More >
Author BioHazard
Game Alien Swarm

Rating
Your mission was to find and destroy a secret alien lab. Now you have crash landed and are stranded in an infested forest. Find your way to the underground entrance and complete your mission. Be sure you read any hints on the screen and pay attention to the areas around you. Check computers, look for keys, and conserve your gear, you're going to need it.
09/30/14
2,765 views
2 Maps
09/30/14
2 Maps Co-Op Campaign
09.30.14 Feedback 1
Your mission was to find and destroy a secret alien lab. Now you have crash l... More >
Author BioHazard
Game Alien Swarm

Rating
Your mission was to find and destroy a secret alien lab. Now you have crash landed and are stranded in an infested forest. Find your way to the und...
3 Maps Co-Op Campaign
09.29.14 Feedback 0
Welcome to the harsh planet of Tarnor. A nearly airless rock circling an anci... More >
Author Ezekel
Game Alien Swarm

Rating
42MB Download
3 Maps
3 Maps Co-Op Campaign
09.29.14 Feedback 0
Welcome to the harsh planet of Tarnor. A nearly airless rock circling an anci... More >
Author Ezekel
Game Alien Swarm

Rating
Welcome to the harsh planet of Tarnor. A nearly airless rock circling an ancient Red Giant, the planet is subject to baking heat in the day and freezing colds at night. Despite the unforgiving nature of the planet, the bustling colony of Oasis thrives on the surface as a major trading hub. It's often been said that whatever you need you can find it at Oasis, for a price. However, the colony has...
09/29/14
2,366 views
3 Maps
09/29/14
3 Maps Co-Op Campaign
09.29.14 Feedback 0
Welcome to the harsh planet of Tarnor. A nearly airless rock circling an anci... More >
Author Ezekel
Game Alien Swarm

Rating
Welcome to the harsh planet of Tarnor. A nearly airless rock circling an ancient Red Giant, the planet is subject to baking heat in the day and fre...
Co-Op
09.29.14 Feedback 0
Escape from the famous ship: THE TITANIC This is my first map which I upload... More >
Author Alexman24
Game Alien Swarm

Rating
3MB Download
Co-Op
09.29.14 Feedback 0
Escape from the famous ship: THE TITANIC This is my first map which I upload... More >
Author Alexman24
Game Alien Swarm

Rating
Escape from the famous ship: THE TITANIC This is my first map which I upload (not the first I created) and it includes: custom textures scripted sequences An easter egg And a lot more to discover...
09/29/14
1,982 views
09/29/14
Co-Op
09.29.14 Feedback 0
Escape from the famous ship: THE TITANIC This is my first map which I upload... More >
Author Alexman24
Game Alien Swarm

Rating
Escape from the famous ship: THE TITANIC This is my first map which I upload (not the first I created) and it includes: custom textures scripted ...
Holdout
09.29.14 Feedback 0
This is a survival map, where our place is the arena of battle. Our job is to... More >
Author Kamil_Killer - PL
Game Alien Swarm

Rating
1MB Download
Holdout
09.29.14 Feedback 0
This is a survival map, where our place is the arena of battle. Our job is to... More >
Author Kamil_Killer - PL
Game Alien Swarm

Rating
This is a survival map, where our place is the arena of battle. Our job is to kill the aliens in 1500. The map is quite difficult, you need to cover a good tactic. I wish you good fun.
09/29/14
1,595 views
09/29/14
Holdout
09.29.14 Feedback 0
This is a survival map, where our place is the arena of battle. Our job is to... More >
Author Kamil_Killer - PL
Game Alien Swarm

Rating
This is a survival map, where our place is the arena of battle. Our job is to kill the aliens in 1500. The map is quite difficult, you need to cove...
Marines
09.26.14 Feedback 0
1_ Extract the .ZIP file. 2_ Move the robot-1.vpk file to ":\Program files\St... More >
Author lucas rojas
Game Alien Swarm

Rating
2MB Download
Marines
09.26.14 Feedback 0
1_ Extract the .ZIP file. 2_ Move the robot-1.vpk file to ":\Program files\St... More >
Author lucas rojas
Game Alien Swarm

Rating
1_ Extract the .ZIP file. 2_ Move the robot-1.vpk file to ":\Program files\Steam\SteamApps\common\alien swarm\swarm\addons" 3_ Play!!! Hope You'll enjoy it! Note: _To disable the skin, go in-game --> Options --> applications and uncheck "Robot-1".
09/26/14
1,652 views
09/26/14
Marines
09.26.14 Feedback 0
1_ Extract the .ZIP file. 2_ Move the robot-1.vpk file to ":\Program files\St... More >
Author lucas rojas
Game Alien Swarm

Rating
1_ Extract the .ZIP file. 2_ Move the robot-1.vpk file to ":\Program files\Steam\SteamApps\common\alien swarm\swarm\addons" 3_ Play!!! Ho...
Holdout
09.26.14 Feedback 0
A quick survival map I created...and yes, it was significantly edited from it... More >
Author Echo
Game Alien Swarm

Rating
2MB Download
Holdout
09.26.14 Feedback 0
A quick survival map I created...and yes, it was significantly edited from it... More >
Author Echo
Game Alien Swarm

Rating
A quick survival map I created...and yes, it was significantly edited from its TileGen version. =P Basically all marines need to survive for as long as they possibly can. All difficulty modes are supported, but generally speaking this is a very difficult map without at least a couple turrets helping you out. Map overviews and everything. It's also in VPK format. I'm not that lazy. Online play w...
by Echo
09/26/14
1,492 views
09/26/14
Holdout
09.26.14 Feedback 0
A quick survival map I created...and yes, it was significantly edited from it... More >
Author Echo
Game Alien Swarm

Rating
A quick survival map I created...and yes, it was significantly edited from its TileGen version. =P Basically all marines need to survive for as lon...
Holdout
09.26.14 Feedback 0
This is a survival map You have to hold out in an outpost for 10 minutes and ... More >
Author Asus
Game Alien Swarm

Rating
This is a survival map You have to hold out in an outpost for 10 minutes and then an airship comes to save you. This is my first Alien Swarm map I hope you like it. How to install: Extract the .vpk file to: C:\Program Files\Steam\steamapps\common\alien swarm\swarm\addons Edit: How to play custom maps: type "map survival_outpost_snow" for a singleplayer server in the console and it sh...
by Asus
09/26/14
1,596 views
09/26/14
Holdout
09.26.14 Feedback 0
This is a survival map You have to hold out in an outpost for 10 minutes and ... More >
Author Asus
Game Alien Swarm

Rating
This is a survival map You have to hold out in an outpost for 10 minutes and then an airship comes to save you. This is my first Alien Swarm map I ...
Holdout
09.26.14 Feedback 0
Holdout Hi all. New version is 1.9 Added Briefing map. Added wind sound. Adde... More >
Author Proker
Game Alien Swarm

Rating
2MB Download
Holdout
09.26.14 Feedback 0
Holdout Hi all. New version is 1.9 Added Briefing map. Added wind sound. Adde... More >
Author Proker
Game Alien Swarm

Rating
Holdout Hi all. New version is 1.9 Added Briefing map. Added wind sound. Added new decals. Added new models. Fixed some bugs (thx to airsoft343 and his friends) Map has 20 waves. Good Luck.
09/26/14
1,313 views
09/26/14
Holdout
09.26.14 Feedback 0
Holdout Hi all. New version is 1.9 Added Briefing map. Added wind sound. Adde... More >
Author Proker
Game Alien Swarm

Rating
Holdout Hi all. New version is 1.9 Added Briefing map. Added wind sound. Added new decals. Added new models. Fixed some bugs (thx to airsoft343 and...
Holdout
09.26.14 Feedback 0
Hold off against the swarm in this survival map. You have to keep alive for a... More >
Author daniel10166
Game Alien Swarm

Rating
1MB Download
Holdout
09.26.14 Feedback 0
Hold off against the swarm in this survival map. You have to keep alive for a... More >
Author daniel10166
Game Alien Swarm

Rating
Hold off against the swarm in this survival map. You have to keep alive for at least 10 minutes to win the mission.
09/26/14
1,601 views
09/26/14
Holdout
09.26.14 Feedback 0
Hold off against the swarm in this survival map. You have to keep alive for a... More >
Author daniel10166
Game Alien Swarm

Rating
Hold off against the swarm in this survival map. You have to keep alive for at least 10 minutes to win the mission.
Co-Op
09.26.14 Feedback 0
This is a Tilegen but I tried to add enough detail and change it up enough to... More >
Author larrybrains
Game Alien Swarm

Rating
9MB Download
Co-Op
09.26.14 Feedback 0
This is a Tilegen but I tried to add enough detail and change it up enough to... More >
Author larrybrains
Game Alien Swarm

Rating
This is a Tilegen but I tried to add enough detail and change it up enough to make it worthwhile. Enjoy. Put vpk file in addons folder.
09/26/14
1,420 views
09/26/14
Co-Op
09.26.14 Feedback 0
This is a Tilegen but I tried to add enough detail and change it up enough to... More >
Author larrybrains
Game Alien Swarm

Rating
This is a Tilegen but I tried to add enough detail and change it up enough to make it worthwhile. Enjoy. Put vpk file in addons folder.
Marines
09.26.14 Feedback 0
This pack includes recolored marine skins for Alien Swarm. * INSTALL INSTRUC... More >
Author Nepumax
Game Alien Swarm

Rating
This pack includes recolored marine skins for Alien Swarm. * INSTALL INSTRUCTIONS * Put the VPK-file into your "...\Steam\steamapps\common\alien swarm\swarm\addons" folder * DISCLAIMER * If you use my addons for your own addon or mod, just give me a credit... ...or anything else. :)
09/26/14
1,458 views
09/26/14
Marines
09.26.14 Feedback 0
This pack includes recolored marine skins for Alien Swarm. * INSTALL INSTRUC... More >
Author Nepumax
Game Alien Swarm

Rating
This pack includes recolored marine skins for Alien Swarm. * INSTALL INSTRUCTIONS * Put the VPK-file into your "...\Steam\steamapps\common\a...
5 Maps Co-Op Campaign
09.26.14 Feedback 0
There are five missions in this Campaign. All the missions have specific obj... More >
Author Xacktar
Game Alien Swarm

Rating
40MB Download
5 Maps
5 Maps Co-Op Campaign
09.26.14 Feedback 0
There are five missions in this Campaign. All the missions have specific obj... More >
Author Xacktar
Game Alien Swarm

Rating
There are five missions in this Campaign. All the missions have specific objectives. Images for the addon and each mission on the selection screen have been added. Minimaps are available for 4 out of 5 missions. PDAs and Radio transmissions will convey the storyline. Some of the non-objective PDAs are not obvious, so keep an eye out. BACKSTORY You play a Marine attached to the TMF Sisyph...
09/26/14
2,737 views
5 Maps
09/26/14
5 Maps Co-Op Campaign
09.26.14 Feedback 0
There are five missions in this Campaign. All the missions have specific obj... More >
Author Xacktar
Game Alien Swarm

Rating
There are five missions in this Campaign. All the missions have specific objectives. Images for the addon and each mission on the selection scree...
7 Maps Co-Op Campaign
03.14.14 Feedback 0
Extermination is a campaign which unites these maps: Midnight harvest 1 Midni... More >
Author geotavros
Game Alien Swarm

Rating
374MB Download
7 Maps
7 Maps Co-Op Campaign
03.14.14 Feedback 0
Extermination is a campaign which unites these maps: Midnight harvest 1 Midni... More >
Author geotavros
Game Alien Swarm

Rating
Extermination is a campaign which unites these maps: Midnight harvest 1 Midnight harvest 2 Arctic infiltration Area Cold catwalks Yanaurus mine Forgotten Factory Communication station Full Treatment - Syntek hospital
03/14/14
2,438 views
7 Maps
03/14/14
7 Maps Co-Op Campaign
03.14.14 Feedback 0
Extermination is a campaign which unites these maps: Midnight harvest 1 Midni... More >
Author geotavros
Game Alien Swarm

Rating
Extermination is a campaign which unites these maps: Midnight harvest 1 Midnight harvest 2 Arctic infiltration Area Cold catwalks Yanaurus mine For...
Co-Op
03.06.14 Feedback 0
An epic bug hunt featuring a unique blend of co-op play and squad-level tacti... More >
Author Daniel101
Game Alien Swarm

Rating
44MB Download
Co-Op
03.06.14 Feedback 0
An epic bug hunt featuring a unique blend of co-op play and squad-level tacti... More >
Author Daniel101
Game Alien Swarm

Rating
An epic bug hunt featuring a unique blend of co-op play and squad-level tactics. With your friends, form a squad of four distinct IAF Marine classes. Plan your attack using an unlockable arsenal of weapons with countless loadout configurations against a wide variety of aliens. Blaze your way through an overrun, off-world colony, eradicating the alien infestation in environments ranging from the...
03/06/14
3,518 views
03/06/14
Co-Op
03.06.14 Feedback 0
An epic bug hunt featuring a unique blend of co-op play and squad-level tacti... More >
Author Daniel101
Game Alien Swarm

Rating
An epic bug hunt featuring a unique blend of co-op play and squad-level tactics. With your friends, form a squad of four distinct IAF Marine classe...
Co-Op
03.06.14 Feedback 0
This map/campaign is in the early stages, and I thought that I should release... More >
Author XionOfChaos
Game Alien Swarm

Rating
14MB Download
Co-Op
03.06.14 Feedback 0
This map/campaign is in the early stages, and I thought that I should release... More >
Author XionOfChaos
Game Alien Swarm

Rating
This map/campaign is in the early stages, and I thought that I should release a public alpha to get some feedback. I intended to have this map harder than normal, where you couldn't really solo this on easy but you could get through it with a team of 2 if you're smart. There's only 1 map in this campaign at the moment, however I'm in the planning stages of the rest and will release these incre...
03/06/14
1,787 views
03/06/14
Co-Op
03.06.14 Feedback 0
This map/campaign is in the early stages, and I thought that I should release... More >
Author XionOfChaos
Game Alien Swarm

Rating
This map/campaign is in the early stages, and I thought that I should release a public alpha to get some feedback. I intended to have this map hard...
Co-Op
03.05.14 Feedback 0
An alien swarm map for everyone to enjoy! Hope you like it. More >
Author hemuuuli
Game Alien Swarm

Rating
23MB Download
Co-Op
03.05.14 Feedback 0
An alien swarm map for everyone to enjoy! Hope you like it. More >
Author hemuuuli
Game Alien Swarm

Rating
An alien swarm map for everyone to enjoy! Hope you like it.
03/05/14
1,881 views
03/05/14
Co-Op
03.05.14 Feedback 0
An alien swarm map for everyone to enjoy! Hope you like it. More >
Author hemuuuli
Game Alien Swarm

Rating
An alien swarm map for everyone to enjoy! Hope you like it.
Just Downloaded
Marines
09.26.14 Feedback 0
1_ Extract the .ZIP file. 2_ Move the robot-1.vpk file to ":\Program files\St... More >
Author lucas rojas
Game Alien Swarm

Rating
2 Maps
2 Maps Co-Op Campaign
09.30.14 Feedback 1
Your mission was to find and destroy a secret alien lab. Now you have crash l... More >
Author BioHazard
Game Alien Swarm

Rating
Holdout
09.26.14 Feedback 0
A quick survival map I created...and yes, it was significantly edited from it... More >
Author Echo
Game Alien Swarm

Rating
Co-Op
03.06.14 Feedback 0
An epic bug hunt featuring a unique blend of co-op play and squad-level tacti... More >
Author Daniel101
Game Alien Swarm

Rating
7 Maps Co-Op Campaign
03.14.14 Feedback 0
Extermination is a campaign which unites these maps: Midnight harvest 1 Midni... More >
Author geotavros
Game Alien Swarm

Rating
5 Maps Co-Op Campaign
09.26.14 Feedback 0
There are five missions in this Campaign. All the missions have specific obj... More >
Author Xacktar
Game Alien Swarm

Rating