Mods / Bonus

• DDefend The Base V1.1by Deagledore_69420Defend The Base is a team based survival map, you have turrets and ammo. Survive for 6 minutes to win, prepare for a nasty fight!12.0k downloadsupdated 10 y ago
• IInfected Lab X Campaignby 5564653254This map is not mine. If author will ask me to remove it I will remove it immediately. The author is Herezy: Try to find the escape on this laboratory. This is a map into an underground laboratory, your squad need to find the exit, but careful aliens are every where, and there are some ambushes....11.1k downloadsupdated 10 y ago
• MMission Queenby RevenantAliens are on earth. You will need to locate and destroy the Queen in order to give the resistance a hope and a future. Map by Zorg0456.6k downloadsupdated 9 y ago
• CCrude Infestationby jhheightCrude Infestation is a one-map campaign where you have to enter an oil mining facility, clear the infestation, blow it up and escape.6.2k downloadsupdated 4 y ago
• EEvil Corpby PAPI MASTER 8BOLLEvilcorp is a one map campaign for Alien Swarm by GRRRR aka Schleicher. This is the original version but packed in VPK with fixed file conflicts, crashes and download link. EvilCorp has stolen the Parasite from Mars! Kill Everything!. Original Creator : GRRRR aka Schleicher i Only Reupload This F...5.6k downloadsupdated 10 y ago
• WWarehouseby RevenantTry to survive at an abandoned office complex. Created by Sergei 'STALKER4732' Lavrinenco5.5k downloadsupdated 9 y ago
• DDelusion Campaignby RevenantOne map campaign created by ShadowsInRain5.4k downloadsupdated 9 y ago
• GGluon Vengeance Bonus Missionby jhheight---MAP CAN BE FOUND IN BONUS MISSIONS TAB--- Muon gem's brother, the gluon gem, is vengeful towards you for killing his brother back in Lab Ruins and wants revenge. Enter the Gluon Cave and solve this conflict once and for all. Map has bossfight music, which you can turn on/off in advanced audio...5.1k downloadsupdated 3 y ago
• BBunkerby Anti-Tank PillboxSurvive inside a bunker for 5 minutes against multiple alien types that increase in size and number. The bunker contains ammo, sentrys and tesla traps. You will face around one thousand aliens in this mission. This is my first time making a alien swarm map and workshop upload ever. If you find an...4.9k downloadsupdated 10 y ago
• VVictory Mine Reinfestedby RevenantSurvival map from Half-Life 2 by Valve and VIPUKS4.6k downloadsupdated 9 y ago
• BBI Rescueby RevenantRescue colonists or die trying Map by honk Huge gratitude to honk and Casimer General note: For correct gameplay on this map, you must replace yours server.dll (\reactivedrop\bin) with this file -4.4k downloadsupdated 9 y ago
• LLost Causeby Daniel101A small survival map I made for the original alien swarm when the game first came out. I've tweaked it a small bit from that version, messed around with the lighting, added a few roof spawns and various bits and peices.4.3k downloadsupdated 10 y ago
• DDrone Labby RevenantSweep and Burn, what can be simpler? Map by XionOfChaos4.2k downloadsupdated 9 y ago
• QQueen Slayer Finale Campaignby jhheightA small campaign with 1 mission that includes killing the Queen.4.0k downloadsupdated 9 y ago
• FFootballby OrangeWorld Cup Football now in Alien Swarm. At the beginning of the map you join EASY configurator where you are able to setup stuff for a match. Then pick a team and teleport to football arena. Crush ur enemies! Try new Football special challenge for even more nice settings Configurator settings: <Ga...3.7k downloadsupdated 8 y ago
• CChemical Facilityby OrangeChemical Facility SemiPuzzle map by Apairofkings. Never Released before. Map is hard and tricky, has author's trolling, it is fun to explore and find missing stuff, enjoy. Easy difficulty can be good for a first run. Note: Map has some issues, not obvious things and so on, dont rage too hard:) On...3.7k downloadsupdated 8 y ago
• IInvisible Threatby DmitriyInvisible Threat is a one map campaign. This is a map which was second in Biogen Corporation campaign. Players didn't have guns and had to fight almost invisible aliens. In this version the gameplay was changed to have guns and fight usual aliens. The map was originally created by uradzimiru.3.2k downloadsupdated 10 y ago
• KKill Them Allby jhheightA small and simple survival map with respawnable loot. Gets harder after every objective by adding more spawns. Inspired by Killzone2.8k downloadsupdated 8 y ago
• SShoots Survival Mapby jhheightInspired by CS:GO's map called "Shoots". Your objective is to kill 1000 drones and escape into the sewers which are located in the middle of the map.2.7k downloadsupdated 6 y ago
• HHovercraft Survivalby YOJIMBOA survival map by TBomb. Uploaded with author's permission. Your mission is to protect 4 engines on the ship while aliens attack both you and the engines. Beware you can damage engines too with your weapons and melee. Do not try to win this map solo, you won't be able to protect all 4 engines. Do...2.6k downloadsupdated 8 y ago
• BBattlefieldby Mai OoizumiFight to appease the Battlemaster The author is Paradox. If author will ask me to remove it I will remove it immediatel2.6k downloadsupdated 10 y ago
• FFrosty, Survivalby Minigun SpecialistLooks like we have been caved in by the snow marines. Some of our security vents have been damaged, but if we turn on the emergency power we should be fine. Turn on that power! Survive the alien swarm for 800 Kills and exit. By Lycosa. This is the original, unchanged map.2.6k downloadsupdated 7 y ago
• SStorage Facilityby 5564653254The IAF Marines are sent to investigate a swarmed facility that is believed to contain information about experiments made on the Swarm. Large area gameplay with inside and outside parts. By Hendrik L.2.5k downloadsupdated 8 y ago
• SSavage Canopy, Survivalby Minigun SpecialistSurvive... in the f*****g Rain Forest. By Lycosa.2.4k downloadsupdated 7 y ago
• JJacob's Rest Practiceby DmitriyThis tiny addon allows you to play Jacob's Rest Practice map in multiplayer. It is Landing Bay and Cargo Elevator maps united in one map.2.3k downloadsupdated 10 y ago
• DDowned Station (Space Station 2024)by legomanas!!! DO NOT PLAY IF YOU HAVE A BIG KILLSTREAK !!! The Swarm has managed to infest and down our space station circling Planet-P1K4. The colony is at high risk of being overrun, so we're deploying a marine squad to stop the threat immedietely. Yes Commander. They won't survive. But neither will thos...2.1k downloadsupdated 8 mo ago
• SS.E.A.L. campaignby Kelsuis*an elevator will work for TECH only This is a short map with only one mission. Featuring : moving turret I somehow manage to make a rail platform that can transport a player on it while controling turret that will move with TECH. this map will force your TECH to go seperate way, but still suppor...2.0k downloadsupdated 10 y ago
• TTower Defenseby jhheightA tower-defense map where you are the tower and you need to defend yourself. Oh, and you have teammates. NOTE: This map is hard. Do not play on easy if you have less than 3 players in your team. Because of aliens' slow speed they will not reach you and it will be impossible to finish on easy. Hav...1.9k downloadsupdated 9 y ago
• JJuno Outpost Survivalby MickmaneSingle Map holdout with 10 minute timer. You can move into a building that has some supplies, and hole up for the majority of the time, at the end you have to get back out, though. I did not make this map, I'd just like to play it again in Reactive Drop, and maybe others will, too. If the origina...1.8k downloadsupdated 8 y ago
• FForbidden Outpostby PAPI MASTER 8BOLLThis map is extremely complex, quite short, but hard also. Enjoy and reach the Forbidden Outpost! To enable custom particles use this file Moddb.com, also read comments there (update old version of absolute madness if exists) (I upload This Later) Many effects so requires rather good pc, and mayb...1.8k downloadsupdated 9 y ago
• BBrook, Survivalby Minigun SpecialistA survival map by Nightgunner5. The objective is to survive 6 waves. "There's a peaceful stream flowing gently across the ground... But what was that tremor I felt?"1.7k downloadsupdated 7 y ago
• KKillzone, Survival, Originalby Minigun SpecialistThe original survival map by hardcorekillernl(hk). The objective is to kill 2 000 aliens.1.6k downloadsupdated 7 y ago
• CCostalby jhheightCostal: A map that features a boss fight. You have a limited amount of weapons to choose from and a limited amount of ammo. Note: It is hard to complete solo, because it's meant for cooperative play. There are many director spawners, so playing on Onslaught will give a real experience of a boss f...1.5k downloadsupdated 8 y ago
• DDeswarmby KablaaaFirst jump map in Alien Swarm, prepare to rage quit. Master movement to complete all 5 rooms or see how far you can get. How to Air Strafe: If moving up with "W" then wanting to curve to the left. After you jump tap "A" then hold "S" (this works in all directions judging from your initial jump di...1.5k downloadsupdated 7 y ago
• BBunker Assaultby Minigun SpecialistThese heroes were the last known survivors at Jacob's Rest. Can you survive as long as they did? By <GdLk> Mudkipz. Map name is asi-bunker Note. Set your Options - Video - Bloom to Low or map will look too bright. Leaderboards1.5k downloadsupdated 7 y ago
• WWoodland Holdoutby Minigun SpecialistHoldout against massive waves of bugs at a forest campsite. By Darkslime.1.2k downloadsupdated 6 y ago
• CCube, Puzzle Missionby Minigun SpecialistComplete the objectives and escape the cube complex. By Toby Kellaway. --- For optimal gaming experience lower the Bloom setting to Low in game's Options - Video - Advanced.859 downloadsupdated 5 y ago
• OOutpost Assembly (RCI2025)by Ground ControlCrash landed on a swarm-infested planet, your squad must scavenge your wrecked ship for parts and fortify your defenses. Hold out against endless waves while waiting for extraction... or die trying. Gather scrap metal by destroying nearby ship debris. Equip the build tool. Select the structure yo...356 downloadsupdated 10 mo ago
• TThe Coliseumby trick-masterHello Commander I have the pleasure to announce that Your Team have been selected to participate in our upcoming Tournament in the Coliseum! You will have control a large variety of captive aliens in order to subdue your opponents. We hope that you will use those ressources wisely, and we pray fo...335 downloadsupdated 3 y ago
• CCrazy Space Stationby 76561199041204801Welcome to Crazy Space Station. Made for the 2024 mapping competition. With "some" help from Ben Lubar, Jhheight and vq.247 downloadsupdated 3 y ago
• SSurvival Infestationby Risb0Resist the waves of aliens in biology colony resarch #42 until the satellite sends information about the invaded camp. Credits: -------- -Original author - Models for the alien plants for the purple tree base for the utilitarian space truck fot the outpost building for all the rts typed buildings...214 downloadsupdated 2 y ago
• CCrawlspace (Pre-Alpha)by sniffy194Crawlspace is a work-in-progress map for Alien Swarm built around the third-person camera. Fight through a winding and infested space station with your friends, set off the self-destruction sequence, and get to the cargo bay through endless waves of the bugs that have colonized the ship. This map...176 downloadsupdated 2 y ago
• PPenguin Sleddingby legomanasThe penguins Amber and Pearl need your help! Their favorite sledding spot has been overrun by Swarm and now they can't get there safely. Your IAF squad will have to escort and protect them from any harm until they reach the sledding spot! The mission must go smoothly. Fight back the Swarm from th...174 downloadsupdated 9 mo ago
• VVScript Hack Exampleby Ben LubarExample of how to make a custom computer hack with VScript. Requires the beta branch as of June 8th, 2024. Source code included in vpk.163 downloadsupdated 2 y ago
• FFirefightersby legomanasThis building in the middle of a forest is burning! And Parry the Parasite is trapped inside! Quick marines, grab these fire extinguishers and rescue him! dumb little mission where you are a firefighter and must fight fires. i hope you enjoy. P. S. - theres a lot of fires, so expect a big loss in...81 downloadsupdated 14 mo ago

45 bonus mods, most downloaded first. Each one has its own page here with what it needs to run and where its author publishes it; the files themselves stay with the author and are never re-hosted on this site.