Games like Alien Swarm: Reactive Drop on Steam
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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.
Livelock
Livelock is a co-operative top-down shooter where you play solo or with up to two allies to break the cycle of infinite war between machines. As one of the remaining Capital Intellects, your role is to unlock Eden and revive humanity.
FBC: Firebreak
A three-player cooperative first-person shooter set within a mysterious federal agency under assault by otherworldly forces.
Solstice Chronicles: MIA
In this 2-player twin-stick shooter, use a friendly drone for a game-changing abilities. Survive waves, upgrade, and uncover the mystery in this cooperative, action-packed experience.
Cygnus Enterprises
Action RPG Shooter with Base Management elements, featuring AI NPCs. Take charge of an abandoned outpost, explore a lush alien planet, battle fierce creatures, gather resources, and upgrade your base as you develop your character and bring dozens of distinct weapons to bear.
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!
Relic Hunters Zero: Remix
Relic Hunters Zero: Remix is a remaster of the FREE 1 million player hit game about blasting evil space ducks and turtles with tiny cute guns. It’s fast, it’s tactical, and feels deliciously smooth to play. Unlock new weapons, characters and relics to defeat the Ducan Commander!
SNAKE FARM
A top-down action roguelike about buying snakes, fighting them, selling their oil, and buying more snakes. Upgrade your weapons, get stronger snakes to fight, and chase down a high score with only ten days to live.
Killsquad
Hack and slash? Check. Twin-stick-shooter? Check. 4 player coop to slay hordes of aliens & bosses with your friends? Check. Skills, upgrades, weapons, gears, talismans and more to make you stronger? Check. Wake up, bounty hunter. We have a mission for you. Time to clean up the scum of the galaxy.
Orcs Must Die! 3
Slice, burn, toss, zap, grind and gib massive hordes of repugnant orcs in this long-awaited successor to the award-winning Orcs Must Die! series.
Deep Rock Galactic
Deep Rock Galactic is a 1-4 player co-op FPS featuring badass space Dwarves, 100% destructible environments, procedurally-generated caves, and endless hordes of alien monsters.