Top similar games like Radiation Hazard:

Back 4 Blood is a thrilling cooperative first-person shooter from the creators of the critically acclaimed Left 4 Dead franchise. Experience the intense 4 player co-op narrative campaign, competitive multiplayer as human or Ridden, and frenetic gameplay that keeps you in the action.

In SCP: Directive Nine, you’re authorized to weaponize SCPs in a frantic 2–4 player co-op FPS. Gear up with anomalous utility, tackle challenging puzzles, and go toe-to-toe against otherworldly horrors.

World War Z is a heart-pounding coop third-person shooter for up to 4 players featuring massive swarms of hundreds of zombies, focused on fast-paced, gruesomely spectacular action.

Locked into a deadly lease, you and up to 3 friends must scavenge the sewers, face cryptids and stalkers, and fight to keep your sanity… all to pay the rent.

A classic-style hardcore dynamic shooter which takes place in a science underground center.

Stay close together and use teamwork to fight through hordes of infected and other mutated freaks while navigating between saferooms.

Voidseekers is a 1-4 player co-op horror FPS. Shoot, salvage, and survive as you explore corrupted ships in deep space. Get in, take what you can, and destroy the ship to contain the breach, but beware the horrors that seek in the void.

An intense round-based zombie survival FPS, play solo or co-op. Shoot your way through relentless waves of vicious horrors with high-octane objectives, upgrading steampunk weapons, collecting Celtic God powers, and surviving the onslaught of the Quiet Ones.

PURGE - THREE VS BLOOD presents an exciting arena-style zombie apocalypse. Battle ravenous zombie waves with up to 3 players, unlock ranks, maps, unique characters, and a variety of weapons and traps.

6-player co-op survival horror at its finest! Cyborg, monsters and aliens. Free updates

Strike Team Delta is a gripping first-person shooter set in a post-apocalyptic world. Battle hordes of undead, team up with friends, and reclaim our world. Survival is in your hands.

Play alone or team up with others and try to survive while a demon and its minions try to kill you. Your goal is simple. Escape. This might sound easy, but dealing with evil entities is a dangerous business!

Survive the living dead for as long as you are able! Room Invaderz is a wave-based survival game where you and your comrades kill zombies, earn points, and do your best to upgrade your arsenal to see how long you can delay the inevitable.

Based on the community award-winning Doom2 mod with the same name by the same creator, UNLOVED is reimagined in the Unreal Engine 4 to bring forth the unspeakable terror in new ways. Play coop with your friends, increase your skills, mod your weapons and face the horror that this unearthly place holds...

Chased by Darkness is a 1-4 players co-op survival horror. Your mission is to face supernatural entities and banish them to the spiritual plane. Explore, fight enemies and don't let the darkness reach you.

Zombie Demolition: Infinite Zombie Shooter is here to scratch your FPS itch! Pick a weapon of your choice and start blasting endless amounts of zombies. The game has 3 game modes and Vampire Survivors mechanics! Solo or multiplayer up to 4 players!

Hunt down waves of vampiric freaks with friends or on your own in this brutal but fair horde roguelike fps. Explore, upgrade and find secrets to overcome the intensifying challenges thrown at you by a future that never was. Shoot, die, repeat.

A co-op game about exploring dangerous planets with your teammates, collecting and selling scrap metal to survive from the corporation. Assemble your own robot to help your team in your own way. Never be a “rusty coffin”.

Eat weapons, be scared and question your own mind in this Survival-Horror FPS Prop Hunt Roguelike about meat. Golden Light of Rose is a story prequel to Golden Light which follows Rose during her first time in the gut.

This game is a roguelike where you continuously fend off zombies by upgrading your gun. Survive the waves of zombies storming the house with your allies! As the days pass, more zombies will appear, including powerful ones, but you will grow stronger too.

It’s 2091 and megacorp Horzine has produced the ultimate army: an obedient horde of bioengineered monsters called zeds. Now, join the rebel group Nightfall in this co-op action/horror FPS that puts you and your teammates in a battle for the future of humanity.

Dawn of Decay is a 3D low poly multiplayer zombie survival game where players team up to navigate immersive maps, fend off relentless zombie waves, and rely on strategic gameplay to survive.

Put on your armor, choose a rifle or a shotgun - now you are part of a special forces group. Shoot your way out of a skyscraper full of zombies.

Codename CURE II is an upcoming co-operative first person shooter set in the aftermath of a zombie apocalypse. Create an elite military squad with up to five players and fight your way through hordes of zombies in a variety of dynamic objective missions.

The classic Painkiller series is back! Battle through Purgatory in fast-paced co-op action, wielding infernal weapons against relentless demonic hordes. Condemned for your sins, the Voice of the Creator offers you a chance at redemption. Will you seize it or be lost to darkness?

Backrooms: Liminal Conflict is a PvP game featuring different factions, a complex multi-layered map, and multiple paths to escape.

GTFO is a hardcore cooperative horror shooter that throws you from gripping suspense to explosive action in a heartbeat. Stealth, strategy, and teamwork are necessary to survive in your deadly, underground prison. Work together or die together.

Collect crazy power-ups, upgrade your weapons into tools of destruction, and escape from the robotic zombie horde - alone, or with friends.

Unleash heavy weaponry to exterminate the demonic horde alone or up to 4 players online and/or in splitscreen

6-player co-op survival horror at its finest! Free updates, free special events and a ridiculous amount of fun!

Blight: Survival is a PvE Action-Horror Game set in a brutal medieval world. Play in solo or team-up with up to 3 friends as you face monsters and men in a tense battle for survival. How far are you willing to go?

In a free, add-on mod for Killing Floor, created by David Hensley (with help from Killing Floor originator, Alex Quick), you can fight off the bizarre and warped toys of someone's nightmare, that are hell-bent on finishing you off. All the standard Zeds are replaced with evil toys, set in the Devil's Dollhouse map.

Embark on a covert mission to the dinosaur theme park Prehistoria, where you must explore the park's grounds to scavenge resources, solve puzzles, and fight your way through diverse biomes, underground tunnels and deadly enclosures. But beware, you are not the apex predator here.

Experience Halloween in this 1-4 player co-op game! Traverse eerie haunted attractions, solve puzzles, evade sinister entities as you try to escape together.