Games like Alien Swarm on Steam
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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!
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.
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!
Of Guards And Thieves
Of Guards and Thieves is a multiplayer stealth game in which high-powered guards face off against fast and elusive thieves in a contest of wits. Outsmarting the enemy and shooting your way through to the goal are equally valid strategies. Simple rules, emergent gameplay and high replayability.
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.
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!
Light Bearers
Light Bearers is a multiplayer asymmetrical hide and seek game that pits a sinister shadow against cute light bears!
Tribes: Ascend
This edition packages weapon DLC from ten previous expansions as well new featured content.
No More Room in Hell
The chances of you surviving this all out war of society and the undead are slim to none. Already, there are millions of the walking dead shambling about, searching for food to eat. There's no known cure. One bite can possibly end it all for you. However, you aren't alone in this nightmare.
World of Warships
Immerse yourself in thrilling naval battles and assemble an armada of over 600 ships from the first half of the 20th century — from stealthy destroyers to gigantic battleships. Change the look of your ship, choose upgrades to suit your play style, and go into battle with other players!
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.
Snake Force
Snake Force is an alternative top-down shooting game inspired by the classic game Snake. In this game, you’ll rescue your bros and fight along side with them. You and your bros will stand in a line, and shoot at the same point. Keep the shape of your squad, because bullets hurt whatever they hit.
One-armed robber
One-armed robber is a chaotic first-person heist game that centers around a uniquely challenging premise. Players take the role of a determined robber equipped with only one arm, tasked with pulling off daring heists on banks, shops, and various establishments.
Zombie Panic! Source
Dive into the zombie apocalypse with Zombie Panic! Source: a cooperative, survival-horror first-person-shooter. A fast-paced standalone modification.
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.
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.
GunZ 2: The Second Duel
GunZ 2: the Second Duel is a free-to-play 3D TPS and is the most fast-paced tough action shooter game.
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.
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.
Teeworlds
Teeworlds is a free online multiplayer game, available for all major operating systems. Battle with up to 16 players in a variety of game modes, including Team Deathmatch and Capture The Flag. You can even design your own maps!
Strife®
Strife® is a truly free to play, competitive, MOBA that features non-stop action and engaging combat. Take control of powerful and versatile heroes, each capable of dominating in unique ways, and exert your will in an epic battle between two teams.
HELLDIVERS™ 2
The Galaxy’s Last Line of Offence. Enlist in the Helldivers and join the fight for freedom across a hostile galaxy in a fast, frantic, and ferocious third-person shooter.
PICO PARK:Classic Edition
PICO PARK:Classic Edition is a cooperative local multiplay action puzzle game for 2-10 players.