Mods / Cooperative

• RRed Light Districtby SyndroidSecond map from Serious Duke 3D.. Requires Serious Sam 3 and the Hollywood Holocaust map in order to work. additional credits: prop models & textures: Duke 3D HRP community project: +prop models: Hollwood Holocaust Rethinked (Tea Monster, Mark, Spiker) ambience music: Duke Nukem Time To Kill figh...32.3k downloadsupdated 4 y ago
• RRed Day: Episode Oneby DeadkadathRed Day: Episode One is a custom campaign that tell you a story about war against Mental's Horde in Russia. ⋆ MOD OF THE MONTH on croteam.com: ⋆ FEATURED MOD on Serious Sam Fusion news: Storyline It's two years after Mental's invasion and what you expect? Egypt? Nah. Welcome to Russia, a typical...15.8k downloadsupdated 7 y ago
• BBFE Enhancedby BiomechanoidNow available for Serious Sam Fusion. BFE Enhanced is a custom campaign that aims to bring back the classic SS1 action and feel to the BFE campaign. This new version of BFE Enhanced features updated models, retweaked enemy spawns in some sections, better looking levels, more secrets and new power...13.1k downloadsupdated 5 mo ago
• AA Seriously Stupid HD Remaster (Part 1/4)by Seriously StupidREAD BEFORE DOWNLOADING: ASSHDR is split into four parts. Subscribe to the other parts here: also: if you like this mod, maybe try out the "Alternate" pack here: This mod is not a replacement of the original TFE and TSE HD campaigns, but it might not be compatible with other mods that modify the...11.1k downloadsupdated 4 y ago
• AA Seriously Stupid HD Remaster (Part 2/4)by Seriously StupidREADME Content files required for running A Seriously Stupid HD Remaster. Make sure you also have Parts 1, 3, and 4 subscribed to, along with all of its required items before downloading. Part 1 can be found here: Part 3 can be found here: Part 4 can be found here: Part 2 contains: - Database Fil...10.7k downloadsupdated 5 y ago
• AA Seriously Stupid HD Remaster (Part 4/4)by Seriously StupidContent files required for running A Seriously Stupid HD Remaster. Make sure you also have Parts 1, 2, and 3 subscribed to, along with all of its required items before downloading. Part 1 can be found here: Part 2 can be found here: Part 3 can be found here: Part 4 contains: - Textures9.6k downloadsupdated 6 y ago
• AA Seriously Stupid HD Remaster (Part 3/4)by Seriously StupidContent files required for running A Seriously Stupid HD Remaster. Make sure you also have Parts 1, 2, and 4 subscribed to, along with all of its required items before downloading. Part 1 can be found here: Part 2 can be found here: Part 4 can be found here: Part 3 contains: - Textures9.6k downloadsupdated 6 y ago
• HHarbinger's Enemy Assetsby [-:-]HarbingerWell its happening finally, my Enemy Resources from HD have been fully ported to Fusion and ready for your using pleasure, though I am a bit weary of how they are being used, so some might not work the same but they should function just as well. You'll need the Ooze Gun till I can safely extract...9.5k downloadsupdated 9 y ago
• OOverwatch Weapon Packby NSKuberDESCRIPTION Update! The mod now REQUIRES "Weapon Engine" for some weapons to function properly; Added 2 new weapons: Sigma's Hyperspheres and Baptiste's Biotic Launcher; To use these weapons, subscribe to this mod and all mods listed as required. Then launch moddable version of the game and use C...9.1k downloadsupdated 6 y ago
• DDOOM 2016: Weapons Packby Danny S."Your affinity for guns is apparent. I'm confident you'll find something useful there as well." DOOM 2016 Weapons Pack brings all your favorite great weapons used by the Slayer to Serious Sam. Use their firepower againts hordes of Mental's mindless aliens. Included content Weapons: Singleplayer:...9.1k downloadsupdated 6 y ago
• RRiverdance 2017by DeadkadathWelcome back to 2005! Take a walk along the sunny beach, kick some asses of these ugly one-eyed freaks and save Simbas's village from Mental's invasion! ❂ The "Riverdance" level from Serious Sam 2 now in Serious Sam Fusion 2017! ❂ Significantly improved visuals and atmosphere ❂ Old good secrets (...9.0k downloadsupdated 6 y ago
• SSeriously Retro : Karnak 1996by Dom" Seriously Retro : Karnak 1996 " is a total-conversion for Serious Sam Fusion 2017 Styled after the First Person Shooters of yester-year, this modification aims to revisit the iconic Karnak Temple complex from Serious Sam : The First Encounter. Not everything is as it seems, however - even seaso...8.9k downloadsupdated 6 y ago
• RRemastered Enemy Resource (Fusion) 2017by Spy's Cr3edRemastered Enemy Resource (HD) 2017 is a pack of enemies that mappers can use to their levels.Now it's port and available to Fusion ! Video Demonstration by : Soulmyr from the previous version .:Updates:. .:V1 Original:. *Beheaded WaveBlaster's electricity projectile is visible *Cucurbito Bone Co...7.9k downloadsupdated 9 y ago
• TTeam Fortress 2 Weapon Packby NSKuberTo use these weapons, subscribe to this mod and all mods listed as required. Then launch moddable version of the game and use CWM or any other weapon-related mod of mine to obtain weapons. Check CWM mod description if you have troubles using CWM! You have to have both HDTFE and HDTSE installed in...7.3k downloadsupdated 7 y ago
• MMonsters Weaponsby Neo_miniganDid you also want to take monsters weapons when you was playing Serious Sam? Why main hero cant take it and use it like cool guy? So.. Now he can. Main features: == The First and Secound Encounter == - 11 new weapons that you can take from enemies: Rocketman Gun - 20 dmg X 500 ammo (slow) Firecra...6.1k downloadsupdated 7 y ago
• SSerious Sam BFE : Devolvedby DomAbout the mod "Serious Sam BFE : Devolved" is a Campaign for Serious Sam 3 : BFE that focuses on devolution. The aim is to make the game's flow and pacing closer to the Classics', while maintaining BFE's gritty style. Devolved weapons, Devolved levels, Unmatched action - this is Serious Sam at it...5.9k downloadsupdated 6 y ago
• [[Gamemode/Resource Pack] T&C Co-Opby Cyborg.SeriousSiteFor the best experience, use T&C Co-Op Lobby as starting level Description Welcome to the new gamemode, which brings chaos of randomness into standard cooperative gameplay. This mod was born from desires and ideas to create something replayable and simply a bit funnier. Therefore, with this mod,...5.7k downloadsupdated 9 mo ago
• DDual Wield [Resource]by NSKuberThis is a weapon pack with two special "Dual wield" weapons which allow you to dual wield most of the default HD/BFE weapons. This mod doesn't allow you to dual wield any other weapons. Why wait for SS4 when you can just mod Fusion? Instructions Make sure you have this mod and all required (see o...5.7k downloadsupdated 6 y ago
• SSerious Sam 4 Enemies Pack (Replacement)by AlfeosThis pack refreshes most of the enemies from SS 3 with more detailed skins and gives new feelings from the gameplay! Original monsters were replaced with identical counterparts from Serious Sam 4 and fully adapted to the mechanics of the SS 3 Feaures:Replaced Kamikaze, Rocketeer, Bomber, Firecrac...5.5k downloadsupdated 5 y ago
• SSerious RPG (Gamemodes)by NSKuberDESCRIPTION Ever wanted to feel more pride and accomplishment when destroying hordes of Mental scum? Or wished that double shotgun didn't suck on final levels of the game? Or maybe wanted a layer of randomized difficulty in Sam? All of the above can bring this new gamemode (actually, two gamemode...5.3k downloadsupdated 6 y ago
• TThe 7Smoke Tennis Project 2018: Blue Edition [SP/COOP]by noam 2000INTRODUCTION Presented to you by members of the Seven Different Kinds of Smoke community: this is a custom campaign ten levels long made by ten different contributors - every level made by a different creator, but with one overarching thematic and storyline. Every mapper makes use of their own le...5.2k downloadsupdated 7 y ago
• UUrsul Suburbs 2020by DeadkadathRemastered Serious Sam 2 level. It was great in 2005, but now it's gonna be serious! Welcome to Ursul Ursul - the legendary city of M'digbo planet. To find the first part of the Mental Medallion, you must free the Simba shaman from the Kukulele prison! Battle your way through the city of the whit...5.2k downloadsupdated 6 y ago
• AA Seriously Stupid HD Remaster - Alternate Editionby Seriously StupidNOTE: THIS ADDON IS NOT REQUIRED TO RUN THE BASE VERSION OF ASSHDR, THOUGH SAID ADDON WILL REQUIRE ASSHDR + OTHER LISTED ITEMS TO WORK This is the Alt Pack for A Seriously Stupid HD Remaster. What this changes are the look/aesthetics of all the levels to be a bit different. Functionally, it's a s...4.9k downloadsupdated 4 y ago
• ((SP/COOP) The Curse Of Sekhmetby UrbanDeHumanA new singleplayer/cooperative map for Serious Sam Fusion 2017. The map was made for the July 2017's "Project News" by SeriousSite.ru. The map takes place somewhere between TFE levels: Luxor and The Great Pyramid. As Sam was getting through Thebes after activating the beacon for a sirian spaceshi...4.8k downloadsupdated 6 y ago
• QQuake 1 Enemies - Fusion Updateby [-:-]HarbingerYup its back and better than ever! With the release of Fusion, I can change the Quake Enemies in ways never seen before, stay ready for nearby updates. It adds the Expansions and some Unofficial creations from the Quake Community, hope you enjoy. UPDATE: Three New Enemies, Some Tweaking across th...4.8k downloadsupdated 7 y ago
• RRealm of Despairby DeVoUPDATE: Version 1.196 -Recreated Visibility Version 1.195 -Remade Crystal Shader Version 1.19 -Added fixes made by Solais due to recent Patch Version 1.16 -Changed Klodovik version from Default to BFE Version 1.15 -Fixed 2 of the bosses having music from my unfinished music remaster, sorry about...4.7k downloadsupdated 8 y ago
• CCitadel of Sandsby ThanadraxBefore approaching Memphis, Sam has found an interesting village, which has been called a mirage by other explorers many years ago. They say, that it disappears every time you try getting closer. Yet, Sam found it kind of physical, so another adventure begins! Yet, you need to know - every legend...4.6k downloadsupdated 8 y ago
• MMore Classic Looking Weapons [mini-mod]by LexMentalA mini-mod that tweaks viewmodel position and changes some weapon models so they look a bit more like in the classic games. This is a list of files that are changed ❗❗❗Databases files changed: Content\SeriousSamHD\Databases\Weapons\CannonWeaponRendering.ep Content\SeriousSamHD\Databases\Weapons\C...4.6k downloadsupdated 9 y ago
• AApproaching Hell: Extended Editionby BiomechanoidApproaching Hell is a custom campaign created by NHunter that aims to be a prequel to Serious Sam 3: BFE. The Extended Edition not only includes fixes, improved lighting and some tweaked spawns, it also includes the fifth level of the campaign. And if you're wondering, yes I did get permission fr...4.6k downloadsupdated 8 y ago
• SSaving Private Pesko: Remasteredby MarkoJPlease be aware of the following changes: 1. No Further Updates:There will be no additional updates of patches released for "Saving Private Pesko: Remastered". The current version available on the Steam Workshop will be the final iteration. 2. Technical Support: Unfortunately, I won't be able to...4.5k downloadsupdated 6 y ago
• TThe 7Smoke Tennis Project 2018: Red Edition [SP/COOP]by noam 2000After the 7Smoke Tennis 2018: Blue Edition, comes the second half of an expansive and ambitious Serious Sam custom campaign – the 7Smoke Tennis 2018: Red Edition! Powered by the creative collaboration of 10 Serious Sam mappers, 16 voice actors, three artists and more – the 7Smoke Tennis 2018: Red...4.4k downloadsupdated 5 y ago
• SSnowy Gravesby ThanadraxAfter defeating Exotech Larva, sam has been teleported to the Citadel, but something went wrong. Instead, he got teleported to some snowy swamp around. There's probably things going wrong too, as netricsa recognizes high Mental's minion signals from the building in the graveyard. Find a way how t...4.4k downloadsupdated 8 y ago
• SSerious Sam HD: BFE (SP/COOP)by BiomechanoidSerious Sam HD: BFE is a custom campaign that gives the SSHD levels a BFE coat of paint, to say the least. This mod originally started off as a joke mod that overly desaturate the colors (to poke fun at BFE's more desaturated color scheme) and adds in ClearBlueSky skyboxes and midday lighting to...4.4k downloadsupdated 2 y ago
• WWinter Wonderland -- Campaign (2023 Update)by Spy's Cr3ed[.:--:2023 Update:--:.] Christmas and New Year are coming so it's time to replay bunch of festival-themed maps! Thanks to everyone who have made walkthrough videos or directly gave a feedback, this really helped to see what could have been done better. * Besides bug fixing there's lots of visual...4.3k downloadsupdated 3 y ago
• PPlastic Patrol 2: Replastered (Campaign)by PanAfter saving the family home from a tan invasion - the Green army rests and waits for their owner to build a new Crystal Tower. But little did they know that the world has seen what toys can do! It's 2017 and WAR - a brand new hit TV Show - pits Toys against each other in real world locations wit...4.3k downloadsupdated 7 y ago
• AAdventures Of Pesko FUSIONby MarkoJPlease be aware of the following changes: 1. No Further Updates:There will be no additional updates of patches released for "Saving Private Pesko: Remastered". The current version available on the Steam Workshop will be the final iteration. 2. Technical Support: Unfortunately, I won't be able to...4.1k downloadsupdated 8 y ago
• TThe Lost Animationsby AlfeosThis pack includes absolutely every single animation of Sam from the SS2 and SS Xbox cutscenes! This mod is essential for making your own in-game cinematics feel more alive and impressive. Make your Sam dance, laugh, gesture, applaud, and much more... Update December 21, 2025 Added a huge number...4.0k downloadsupdated 6 mo ago
• HHD Harpy Fixby Seriously StupidModifies the puppet parameters and character behavior of HD's Harpy to slightly increase base flying speed, reduce projectile use, and increases the flight speed for their RunOverFoe attack by a small bit. They might still bug out a little if you're running backwards in a straight line, but their...3.9k downloadsupdated 6 y ago
• HHD Flying Gnaar Fixby Seriously StupidReplaces puppet parameters and flying gnaar scheme files to fix the attack radius on Flying Gnaars and restore unused stun animations. Flying Gnaar melee attacks no longer have a large radius of 2/3 (reduced to 1.5), and they'll now stun when taking damage. 10k hours in SED2017.3.7k downloadsupdated 7 y ago
• HHD Werebull Fixby Seriously StupidModifies the puppet parameters of the Werebull's RunOverFoe attack radius, so it activates a little further away from the player. Also mildly increases the Werebull's speed to counterbalance it. You're welcome.3.6k downloadsupdated 8 y ago
• ((HD) Beheaded Destruction Fixby Seriously StupidModifies the destruction settings of the Rocketeers, Firecrackers, and Bombers to gib only when receiving maximum rocket damage (50), allowing their corpses to fly when killed via splash damage.3.6k downloadsupdated 7 y ago
• HHD Headless Soldier Sound Fixby Seriously StupidSmall replacement mod that fixes the sound scheme file for HD's Beheaded enemies. In the "sight" scheme term, there are two variations: one, where a soldier plays a "sight" sound upon spotting the player, and a second entry which is empty (i.e. contains no sounds). Since both of these terms have...3.5k downloadsupdated 8 y ago
• KKMC1: Crystal Impactby ThanadraxThey are calling Welcome to the Khreth Mapping Challenge 1: Crystal Impact - a project, which is the result of the year of work of 17 participants from the slavic community Khreth. The Challenge rules are simple - each participant must continue the map of previous one with their level, having onl...3.5k downloadsupdated 13 mo ago
• HHighlander Reptiloid Improvements (Replacement)by Seriously StupidReplacement mod for HD's Highlander Reptiloids. Modifies puppets, behaviors, models, animations, and schemes for Highlanders and Brides. Changes include: Improved Sound Range - Highlanders now make audible noise from a greater distance. Movement Effects - Now includes step sounds and shake effect...3.5k downloadsupdated 6 y ago
• DDelivery for Mr. Stoneby ThanadraxBefore getting to Grand Cathedral, Sam suddenly lost almost all weapons after falling off the snowy mountains. Looks like it's going to end really terrible!... or not? Netricsa gets a signal from anonymous client, saying that there's a delivery for Sam, waiting somewhere in green hills. A small y...3.5k downloadsupdated 8 y ago
• RRestored Marsh-Hopper Jump Soundsby Seriously StupidReplacement mod for HD's Marsh-Hopper. Restores the missing "Jump" sound effect (though to be fair, it's more of a "landing" sound effect) from Classic. Replaces the Marsh-Hopper model, animation, and puppet parameter files.3.4k downloadsupdated 8 y ago
• AAegis Rocket Launcherby [-:-]HarbingerA new weapon Resource for the masses, take a look at the Aegis Rocket Launcher, it can devestate hordes of enemies at a greater efficiency than the regular Rocket Launcher, however take heed in that it has a bigger explosion radius and packs a stronger self harm damage, use caution! Many Thanks t...3.4k downloadsupdated 9 y ago
• EEnemy Player Model packby NSKuberDESCRIPTION Due to a bug, when you change player model, your collision is not updated automatically. This can be fixed by crouching. This pack contains 25 multiplayer models of enemies encountered in the game, each of them has unique abilities. By default, when a game is started, abilities are di...3.4k downloadsupdated 7 y ago

417 cooperative 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.