Games like Alien Swarm
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SAS: Zombie Assault 4
Purge the undead! Intense action-shooter with deep rpg elements, including upgradeable guns and armor, unique class skills, and class special abilities. Entire game can be played single player or as a 4-player online co-op game, including PvP events like Last Man Standing.
Gatekeeper: Infinity
Prologue version of the game Gatekeeper. Gatekeeper: Infinity is a fast-paced rogue-lite shooter where you'll search for the stolen Heart of the Universe and battle machine enemies! Play solo or join forces with friends in co-op mode.
Aliens: Fireteam Elite
Aliens: Fireteam Elite is a cooperative third-person survival game set in the iconic Alien Universe. Battle through hordes of different types of Xenomorph, customize your character and gear, and level-up as you try to contain this ever-growing threat.
Predecessor
Inspired by the legacy of Paragon, built with love by the community, and powered by Unreal Engine 5, Predecessor is the ultimate fusion of shooter action and MOBA strategy. Join more than 2,000,000 players and play for FREE now!
Alien Breed 3: Descent
Experience the final explosive chapter in the Alien Breed series and uncover the horrifying truth surrounding the existence of the Breed. Launch discount good thru Nov. 24 10am PST.
Sven Co-op
Sven Co-op is a co-operative game originally based around Valve Software's Half-Life. In this game players must work together against computer controlled enemies and solve puzzles as a team.
Eden Rising
Brace yourself for a brand new action-packed Open World. Explore a huge world to gather materials for gear and defenses. Use everything at your disposal to defend your bases and defeat hordes of hostile monsters. Play solo or up to 8-player online!
Marvel Rivals
Marvel Rivals is a Super Hero Team-Based PVP Shooter! Assemble an all-star Marvel squad, devise countless strategies by combining powers to form unique Team-Up skills and fight in destructible, ever-changing battlefields across the continually evolving Marvel universe!
Halo: Spartan Strike
Halo: Spartan Strike makes you a Spartan supersoldier battling evil forces. Delve into 30 challenging missions through cities and jungles using a devastating arsenal of weapons, abilities and vehicles including the iconic Warthog against the Covenant and Promethean enemies. *DirectX feature level 10 required*
Halo: Spartan Assault
Halo: Spartan Assault brings the excitement of Halo combat to Steam for the very first time. Battle your way through 30 action-packed missions against the Covenant as you explore the origin of the Spartan Ops program featured in Halo 4. *DirectX feature level 10 required. *
EARTH DEFENSE FORCE 5
Stand and fight for humanity. This arcade shooter takes place in the year 2022, as the Earth Defense Force fends off an all-out attack by unknown life forms. Become an EDF soldier, battle against endless hordes of immense enemies, and restore peace to the earth.
Dominance
Dominance is a multiplayer top-down shooter, built on a no-limits attitude. Choose between a rich variety of different ability and item combinations, select one of 6 distinct characters. Battle up to 24 foes on the ever-evolving terrain — and prove your Dominance.
Realm Royale Reforged
Join 20+ million players and experience a new kind of battle royale in Realm Royale Reforged! Choose your class, forge deadly weapons, and master powerful abilities to be the last champion standing. Mount up alone or with a team to explore a fantasy world while outrunning the deadly fog.
Alien Breed: Impact
Experience the explosive science fiction arcade-shooter that resurrects a much revered franchise in an epic single player and co-op multiplayer campaign.
HELLDIVERS™ Dive Harder Edition
HELLDIVERS™ is a hardcore, cooperative, twin stick shooter. As part of the elite unit called the HELLDIVERS, players must work together to protect SUPER EARTH and defeat the enemies of mankind in an intense intergalactic war.
Yet Another Zombie Defense
Darkness is coming. How long can YOU survive? Build your base by day, defend it by night. Play in online or local co-op. Stay alive as long as you can.
Shadowgrounds
Shadowgrounds breathes fresh air into the action genre with explosive combat sequences, an innovative weapon upgrade system, and an intriguing storyline. The adrenaline-pumping, top-down gameplay and audiovisual fireworks set the scene for this new action experience which also includes single computer (split keyboard or joystick) co-op...
From Space
From Space is a solo and co-op action-shooter for squads up to four players. Take on the challenge of liberating the earth from an alien infestation with your friends, using over-the-top weaponry in a post-apocalyptic world with awesomely stylized graphics. The apocalypse has never been so much fun!
STAR WARS™ Battlefront
The STAR WARS™ Battlefront™ Ultimate Edition includes the STAR WARS™ Battlefront™ Deluxe Edition as well as the STAR WARS™ Battlefront™ Season Pass.
SYNTHETIK: Arena
Face the varied challenges of the Machine God Zir in ARENA, a standalone expansion for Synthetik: Legion Rising! Leverage the next level in gun-play and experiment with powerful tech in varied action packed Arenas!
SCP: Secret Laboratory
Deep within a secure underground facility, a sudden containment breach allows many of the secured anomalies to escape from their chambers. Assist the Foundation in re-securing the facility, help the Insurgency in their goal to capture it, or wreak havoc as an SCP in a frantic bid to escape.
Hazard Ops
Ready for the next generation of 3rd person shooters? Hazard Ops has zombies, monsters, robots, dinosaurs, mechs - pretty much anything you can point a gun at. Sink your teeth into this action-packed online shooter!
Tom Clancy’s Rainbow Six® Extraction
Tom Clancy's Rainbow Six® Extraction is a tactical, co-op, PvE first-person shooter where you and your squad face an evolving alien threat. Teamwork, tactics, and flawless execution are key to your survival.
Starship Troopers: Extermination
Starship Troopers: Extermination is a 16-player co-op FPS that puts you on the far-off frontlines of an all-out battle against the Bugs! Squad up, grab your rifle, and do your part as an elite Deep Space Vanguard Trooper to take back planets from the Arachnid threat!
Ultimate Zombie Defense
Team up or face it alone in this top down zombie slaying defense adventure! Featuring up to 4 player online co-op, cleanse the infected wave by wave and upgrade your base with traps & defenses to build the Ultimate Zombie Defense. Can YOU stop them?
Fortified
Fortified is an explosive strategy shooter where players will defend the Earth against a menacing Martian invasion in the 1950s. Play as one-of-four pulp inspired heroes as they fight swarms of terrifying robots with an arsenal of Cold War era weapons and experimental technology.
Super Sus
Welcome to join the multiplayer social deduction game - Super Sus! Engage in intense gameplay with global players, as you strategize to safeguard your spaceship from the cunning Impostors determined to sabotage the mission and eliminate everyone aboard!
STAR WARS™ Battlefront™ II
Be the hero in the ultimate STAR WARS™ battle fantasy with STAR WARS™ Battlefront™ II: Celebration Edition!
Thunder Tier One
Thunder Tier One is a realistic top-down shooter where you join an elite special operations team tasked with stopping a dangerous terrorist organization wreaking havoc across the fictional Eastern European country of Salobia.
Alien Breed 2: Assault
Can you survive the alien onslaught? Gamers across the world will now have a chance to play the next chapter in this high-budget, high-quality series.
Aliens vs. Predator™
Survive, hunt and prey in the deadly jungles and swamps in distinctly new and thrilling first person gameplay.
Sanctum 2
Sanctum 2 is the sequel to the world’s first Tower Defense/FPS hybrid game. Pick from four unique character classes and embark on a mission to protect the oxygen-producing Cores from hordes of deadly aliens who are threatened by their existence.
Earth Defense Force: Insect Armageddon
Thousands of giant insects and aliens once again ravage the earth, and only the Earth Defense Force can stop them.
Tribes: Ascend
This edition packages weapon DLC from ten previous expansions as well new featured content.
Super Animal Royale
It’s a fight for furvival! Super Animal Royale is a 64-player, frenetic, top-down 2D battle royale where murderous animals fight tooth, claw, and machine gun across an abandoned safari park.
Warface: Clutch
Warface: Clutch is a contemporary MMO first person shooter with millions of fans around the world. It offers intense PvP modes, compelling PvE missions and raids that you can challenge with five diverse classes and a colossal customizable arsenal.
PlanetSide 2
PlanetSide 2 is an all-out planetary war, where thousands of players battle as one across enormous continents. Utilize infantry, ground and air vehicles, and teamwork to destroy your enemies in this revolutionary first-person shooter on a massive scale.
Aliens: Colonial Marines Collection
You & your friends are the deadliest killers in the galaxy – the US Colonial Marines. It’s up to you to not just survive, but wipe out the Xeno infestation.
Snowbreak: Containment Zone
The new 3D Waifu Sci-Fi RPG Shooter is here! Aim at fate, fight by our side! Clear the specified stage to claim an Orange-Tier Operative!
Spectre Divide
Spectre Divide is the genre-evolving, competitive 3v3 tactical shooter driven by Duality. Use Duality to control two bodies in real-time, letting you defend two sites at once, cover your own cross, or even trade yourself. Master tactical gunplay and an arsenal of future tech to achieve infamy.
Silica
Silica blends FPS and RTS in epic, photorealistic battles. Choose to fight on the ground or command from above as humans or aliens. Dive into thrilling multiplayer combat or master strategic command. Are you ready to survive and conquer?
Rogue Company
Join 20+ million players in Rogue Company, the ultimate third-person tactical action shooter! Become an agent of Rogue Company and wield powerful weapons, high-tech gadgets, and game-changing abilities. Accept the mission and jump into a variety of 4v4 and 6v6 game modes. Play FREE today!
Splitgate
Splitgate is a free-to-play, fast-paced multiplayer shooter that features player-controlled portals. This sci-fi shooter takes the FPS genre to a new dimension with its portal mechanics, delivering high-flying, multi-dimensional combat.
Earthfall
NOW AVAILABLE! When the Earth falls to an extra-terrestrial invasion, humanity becomes an endangered species. Earthfall is a four-player cooperative shooter that challenges players to survive hordes of ruthless alien drones and their inscrutable masters.
Codename CURE
Codename CURE is a first person, co-operative zombie game with support for up to five players, providing dynamic, fast-paced zombie fragging with both objective, and survival-based missions.