Mods / Custom Campaign

• HHorizon -- Campaign (2023)by Spy's Cr3edHere we are again with another campaign, this time done in a way more reasonable time. The campaign's main highlights would be the classic gameplay, linear design and overall just something to enjoy for a while. The main concept was to make a level based mainly on existing assets and to focus jus...2.5k downloadsupdated 4 y ago
• TThe Warchaserby ThanadraxThe "Underworld demons" are loose Welcome to The Warchaser - an SP/COOP adventure set around forests and ruins, where the great "Hades" awaits. This pack of 2 missions is an excuse for release of a very short map, Reminiscence. This time, you will have more time to explore the world, and more foe...2.4k downloadsupdated 4 y ago
• HHills - Custom Campaign Levelby SkorlyA sort of reimagining of the fan favorite Serious Sam level, Dunes. The map should take around 10-15 minutes to beat if you're not going for secrets. The map has not been tested on co-op, but it should work. If you find any bugs, let me know! I'll do my best to fix them. I hope you'll have fun wi...2.2k downloadsupdated 4 y ago
• ((Update) Coldfrontby 76561199040911078History You've appeared in this unknown, maybe Mystical Place with no reason. I've detected some activity from 2000 metres from us. Let's check it out! Features ● Classic Serious Sam gameplay ● 4 Skills ● 20 - 30 min map ● Nothing special, just chill map ● Fun secrets Updates Visual Update ● Adde...2.2k downloadsupdated 5 y ago
• [[SINGLE/COOP] UrbanDeHuman's "Please Fly 2022" Tribute (NEW GAME+ UPDATE)by UrbanDeHumanSome particular circumstances have led you to the flying islands on some planet, unknown to us. Somehow the only thing you know here is to get to the portal that you can activate to leave this place and continue with your life. But maybe the journey is worth being continued? It's up to you to dec...2.0k downloadsupdated 2 y ago
• MMy Memories: Egyptby 76561199040911078My Memories It is a project that aims to improve my old maps and build them on newer engines of Serious Sam series. Here you can once again plunge into the atmosphere of Serious Sam 3, to remember my first map ever which is almost 3 years old and just enjoy the old map, while getting a completely...1.9k downloadsupdated 3 y ago
• RRigatharby Sulphuric_GlueAfter taking off from Earth at the end of The Second Encounter, Sam travels through the empty void of space to seek out Mental and fight him on his own doorstep. However, his ship is unexpectedly caught in a gravity well, and crash-lands on an Earth-like alien planet; Rigathar. Sam's primary conc...1.6k downloadsupdated 19 mo ago
• RReminiscenceby ThanadraxWhat lies in memories isn't always true... Welcome to Reminiscence - an SP/COOP short map set around abandoned church, inhabited by Mental's horde. This mission is my first and, probably, last map for Siberian Mayhem for a long time (depending on how things go). With limited supplies, you will ha...1.5k downloadsupdated 5 y ago
• SSSHDWeapon&Item_CompletePack(Resource)by serious bombSSHDWeapon&Item_CompletePack(Resource) -This package contains SSHD weapons and items, including HD style weapons, HD style health, HD style armor, and HD style bullets. -The weapon has been adapted for Sam 4, and players can call HD weapons and corresponding upgrade accessories through NRM. The a...1.2k downloadsupdated 12 mo ago
• SSSHD Monsters SuperPackage(Resource)by serious bombSSHD Monsters SuperPackage(Resource) SSHD's enemies and their extended enemies This also includes some enemies in the revolution, such as various elemental monsters, GimzoSpawnerWalker The file includes a MonsterTest.wld file,creators can learn how to use the splitting of elemental monsters and t...1.1k downloadsupdated 12 mo ago
• SSS-SM Biomeches SeriousPackage(Resource)by serious bombPackageVersion: v1.5 Biomeches: --MiniGunner Biomech --ShotGunner Biomech --Destroyer Biomech --Flamer Biomech --RedLaser Biomech --Slime Biomech --PlasmaRocketer Biomech --LavaLauncher Biomech --FireBall Biomech --Cannon Biomech --MagicLauncher Biomech --Electricity Biomech --Spawner Biomech --A...1.1k downloadsupdated 12 mo ago
• EEnemyPack Arachnoid-Scrapjack (SS-SM Version)by serious bombEnemyPack Arachnoid-Scrapjack (SS-SM Version) Arachnoid: --Arachnoid-Laser --Arachnoid-Devastator --Arachnoid-PlasmaCracker --Arachnoid-SlimeShooter --Arachnoid-Electricity --Arachnoid-Zealot --Arachnoid-Flamer Scrapjack: --Scrapjack-Cannon --Scrapjack-Grenade --Scrapjack-FireBall Note Because I...1.1k downloadsupdated 14 mo ago
• AAmmoCrate_Packageby serious bombAmmoCrate_Package More ammo crate for mapper ShotGun Shell Crate Assaults Rifle Bullets Crate MiniGun Bullets Crate Grenade Crate AutoShotGun Shell Crate Devastator Shell Crate Sniper Bullets Crate Explosive Crate FRPCL Saw Crate Lase Electricity Crate Burner Electricity Crate CrossBow Crate Cann...1.0k downloadsupdated 17 mo ago
• BBeheaded-Harpy EnemyPackby serious bombEnemyPack Beheaded-Harpy Beheaded: --Beheaded-SuperBomber --Beheaded-SuperRocketeer --Beheaded-Plasmacracker --Beheaded-MiniKamikaze --Beheaded-SmartRocketeer --Beheaded-FireBomber Harpy: --FireHarpy --WaterHarpy --ElectricityHarpy UpdateNote --Fix beheaded use wrong wound animation --Fix Harpy b...1.0k downloadsupdated 12 mo ago
• UUnderdarked - A Serious Journeyby FinzySerious Sam has stepped through a strange portal and finds himself in an even stranger underground realm that's literally out of this world. It's up to you to put together the pieces and figure out what's happened... Loosely inspired and based on the Underdark region from Dungeons & Dragons / For...1.0k downloadsupdated 3 y ago
• AA Serious Encounter(Resource)by serious bombA Serious Encounter(Resource)1.0k downloadsupdated 12 mo ago
• ((FIXED) X-Front 2022 - Eventby 76561199040911078About My first seasoned theme map for Serious Sam: Siberian Mayhem. Hope you enjoy, because it was really fun making this. Gameplay is default, but have some minor changes. Also there is a "quest system" and dialogue gui got an upgrade. Secrets are pretty simple, some of them may be fun and enjoy...838 downloadsupdated 4 y ago
• SSerious SamCraft - Enact the Endingby Sulphuric_GlueThings are getting out of hand, Sam - Mental is invading other games now! Notes This map should be played with prebaked lighting off, or else most of the level will be too dark. I have made efforts to reduce frame drops under dynamic lights as much as I can by using alternate models that use less...727 downloadsupdated 9 mo ago
• FFall of Melancholy Village [Custom Story Campaign]by DizellfestCaught within the darkness an ill man must find a way to solve one mystery on why everyone has disappeared and on why dark creatures started to plague these lands. Explore the Villages, solve the mystery. The notes should help. |||PROJECT INFO||| FoMV is a short side project of mine which tells t...636 downloadsupdated 3 y ago
• SSecrets of Mystical Man :)by 76561199040911078Secrets of Mystical Man The events take place between the end of SS4 and the beginning of SS3. Sam, after killing the Creator, temporarily freed himself from the cycles of the Mystical Place. During this time, he managed to argue with Quinn that he could find something worthwhile in the first cav...582 downloadsupdated 17 mo ago
• TTribe Of The Bells 2026 - Campaignby DizellfestLet the bells ring. DIFFICULTY: Easy Theme: Fantasy, Winter Wonderland Music: Metal, Techno Bot Support: Yes Weapons: Custom, All Unlocked Time To Beat: 25Minutes Enemy Count: Medium Level Count: 1 Universe: Unknown (Not Serious Sam Story) Worktime: 6 Days (FEATURES) - Automatically spawned AI Sa...410 downloadsupdated 11 mo ago
• AAnime Game Character Packby serious bombCharacter List GENSHIN IMPACT ◆Chevreuse ◆Clorinde ◆Dehya ◆Escoffier ◆FischlPrincess ◆Furina ◆Ineffa ◆Jahoda ◆KukiShinobu ◆Mavuika ◆Navia ◆Nefer ◆QianZhi ◆Yoimiya HONKAI: STAR RAIL ◆Stelle ◆Cyrene ◆Firefly ZENLESS ZONE ZERO ◆Nnmber 11 ◆Anby ◆Ling ◆Vivian-Swimwear GIRLS' FRONTLINE 2: EXILIUM ◆Cent...348 downloadsupdated 10 mo ago
• SSeriousDivers : Orbital strikes Packby serious bombSeriousDivers : Orbital strikes Pack For SuperEarth!! For Democracy!! Orbital strikes list: --Orbital Laser --Orbita 120MM HE Barrage --Orbita 380MM HE Barrage --Orbita 500kg Bomb Barrage --Orbita Gatling Barrage How to use？ After subscribing to this mod, update the NRM database, and then call it...150 downloadsupdated 5 mo ago
• SSeriousDivers : Orbital AirDrop Packby serious bombSeriousDivers :Orbital AirDrop Pack For SuperEarth!! For Democracy!! Orbital AirDrop list: --Orbital Rocket Sentry --Orbita Machine Gun Sentry --Orbita Galting Sentry --Orbita Laser Sentry --Orbita AutoCannon Sentry How to use? After subscribing to this mod, update the NRM database, and then call...105 downloadsupdated 5 mo ago
• OOctanian Turret Resource Packby serious bombOctanian Turret Resource Pack UpDate Note: --Add 5 New Turrets --Fixed the issue where turrets might fly away Ground Turret: --Cannon Turret --Grenade Turret --Devastator Turret --Flamer Turret --Rail Laser Turret --Rocket Turret --Minigun Turret --Shotgun Turret --Plasma Cannon Turret --Mine --E...96 downloadsupdated 5 mo ago

25 custom campaign 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.