Games like Alien Swarm
by Valve
Co-operative multiplayer game and complete code base available for free.
View on Steam · Free →
Ranked by how similar the games actually are, not by sales. Released and Price are remembered for next time.
Closest matches
$29.99Active Matter
6 days ago · Matter Team
Both: Co-op · Online Co-Op
Join dangerous raids for loot or intense PvP battles in this new realistic military shooter set in a fractured multiverse. Fight in the quantum unstable zones over control of the active matter – the substance that bends time and space.
FPSHorrorExtraction ShooterPvEPvPAtmosphericCo-opOnline Co-OpMultiplayerAction👍 802
$29.99Valheim
12 days ago · Iron Gate AB
Both: Online Co-Op · Co-op
A collaborative exploration and survival game for 1-10 players, set in a procedurally generated afterlife inspired by Viking culture. Battle, build, and conquer your way to a saga worthy of Odin’s patronage!
Open World Survival CraftSurvivalOnline Co-OpOpen WorldMultiplayerBuildingCraftingBase BuildingExplorationCo-op👍 465,813
$29.99RuneScape: Dragonwilds
6 days ago · Jagex Ltd
Both: Co-op · Online Co-Op
On RuneScape's forgotten continent of Ashenfall, dragons have awoken. Gather, build, skill and craft in this co-operative survival adventure. Only by mastering survival and uncovering ancient secrets can you hope to face the ferocious Dragon Queen.
Open WorldSurvivalMultiplayerOpen World Survival CraftCo-opOnline Co-OpEarly AccessCraftingBuildingBase Building👍 28,410
-20%$7.19Save Mom
3 days ago · Amigos Entertainment
Both: Co-op · Top-Down Shooter · Shooter
A co-op action game about protecting your mom in a post-apocalyptic world. Explore ruined cities, gather resources, upgrade your motorhome, build defenses, and battle enemies. Your mission: Get Mom to safety. Her survival is in your hands!
ActionCo-opCartoonyTop-Down ShooterPvEFunnyShooter3DPost-apocalypticBase Building
Also worth a look
Share some of the same DNA, but further from the original.
-15%$12.74Biovoid
3 days ago · Dzedou
Both: Aliens
Biovoid is a creature-building roguelike game where you slay hordes of hostile aliens. Combine a variety of cells and mutations to create game-breaking builds and evolve from a fragile hatchling to a deadly predator.
Action RoguelikeSimulationSandboxNatureSurvivalProcedural GenerationBuildingPerma DeathDifficultAliens
-40%$14.99CONVRGENCE
4 days ago · Monkey-With-a-Bomb
Both: Shooter
CONVRGENCE is an atmospheric VR extraction shooter set in the procedurally generated, ever-changing Chernokamensk Anomaly Zone. Scavenge loot, fight bandits and hunt for mystical artifacts — all with your loyal dog companion by your side. But extract before nightfall, or face what lurks in the dark.
VRAtmosphericPost-apocalypticShooterExtraction ShooterLooter ShooterLootSurvival HorrorSurvivalHorror👍 1,588
$11.99Sublight
6 days ago · CODEBREW SOFTWARE LTD
Both: Top-Down · Sci-fi
Sublight is a space bullet heaven roguelike, where you captain a powerful warship and carve through escalating waves of enemies. Upgrade your arsenal, unlock new ships, and experiment with countless builds to dominate the battlefield.
Action RoguelikeBullet HellRogueliteArcade3DTop-DownActionCasualLootSci-fi
$4.99Tales of Terror
Sep 1 · BearfoxBear
Both: Online Co-Op · Shooter
Tales of Terror invites you to delve into a chilling co-op horror survival experience. Unite to face unique enemies, navigate through visually stunning and treacherous levels and navigate the unknown. —Your ultimate challenge awaits: escape, if you can!
HorrorOnline Co-OpMultiplayerActionSurvival HorrorAdventurePvEAction-AdventureFirst-PersonShooter
$24.99Anymaker
3 days ago · Geometa
Both: Co-op
Embark on your creative journey of vehicle design, as you create and operate vehicles to survive this dangerous open world. Anymaker is a detailed and technical vehicle builder and survival game. Design your chassis, build your engine, connect components, and travel into the unknown.
Early AccessSandboxSimulationOpen WorldMultiplayerBuildingFirst-PersonRealisticCo-opDriving👍 115
-20%$10.39Two Sides of Hell
4 days ago · Red Sky Games
Both: Shooter
Think fast, kill faster. Blast through shifting alien hellscapes in this roguelite platform-twin stick shooter, switching between Soldier precision and demonic destruction. Survive relentless hordes, brutal bosses, and endless roguelite chaos.
ActionRoguelikeRogueliteBullet HellTwin Stick ShooterShooterLocal Co-OpPlatformerPvEFuturistic
$5.99MOTORGRAVE Wasteland Horde
Aug 31 · Redcontroller Interactive
Both: Shooter · Top-Down
Drive, ram, and blast through endless zombie hordes in a top-down vehicular action game, then upgrade your weapons, unlock brutal war machines, and carry your growing arsenal into the next run.
ActionRacingArcadeShooterIncremental3DTop-DownPost-apocalypticIndieController
-35%$20.79The Crust
11 days ago · VEOM Studio
Build and automate a lunar colony that Earth depends on. Mine regolith, run conveyor-and-drone factories above and below the surface, manage colonists, trade with rival Earth factions — and play a story campaign with multiple endings.
Base BuildingSpaceAutomationColony SimResource ManagementSandboxStrategyCity BuilderBuildingManagement👍 3,556
FreeAniimo
6 days ago · Pawprint Studio
Both: Online Co-Op · Co-op
Aniimo is a free-to-play, next-gen creature-catching open-world RPG. Explore the vast continent of Idyll, Twine with unique Aniimo, unlock new abilities. Travel to a sky-floating metropolis, meet other Pathfinders, and battle in exciting competitions. Choose your Aniimo and begin your epic journey!
Open WorldCreature CollectorMultiplayerAdventureRPGExplorationCollectathonOnline Co-OpPvPCo-op
-10%$8.99RPG System
7 days ago · J&V ENTERTAINMENT LTDA
Both: Online Co-Op · Co-op
RPG System is an indie system created to enhance your tabletop RPG sessions with friends. Create characters, roll dice, manage tactical turn-based combat, and bring your own stories to life on a cooperative online virtual tabletop for up to five players.
RPGTabletopParty-Based RPGOnline Co-OpMultiplayerSimulationCharacter CustomizationTactical RPGCo-opExploration



