Top similar games like Hazard Protocol:

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.

Make It Count is a 1-3 players Co-op, post-apocalyptic, top-down shooter with roguelite elements. Venture into your mission with randomized routes, find trinkets and bring carnage to the filth that is infesting this world!

A tactical 3D top-down zombie shooter with an innovative Field-of-View system. Tasked by researchers, you must uncover the cause of the zombie outbreak while managing scarce ammo, using tactics, melee, and grenades to survive endless waves.

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.

Join the fight for survival in a top-down shooter with realistic-looking combat. Raid the infected city and fight for survival in team battles.

"Synapse: Lockdown" is a co-op FPS survival horror game. As a member of the Hermes team, you're deployed to the threatened city of Pantheon. Explore facilities, complete missions, and escape safely. Gather weapons and items, and work with your team to face unknown horrors.

Welcome to Nightmare Manor - a terrifying horror game that will take you to an old manor steeped in dark history. In this game, you will feel the cold breath of the past, finding yourself in a place where sinister entities live.

A cooperative horror game where you must work to maintain a base to keep monsters from getting in.

The Silent Jungle is a classic survival horror game set deep within the haunting jungles of Vietnam. After a brutal ambush, a lost American soldier must survive in a cursed jungle filled with lethal traps and haunting illusions. To escape, he must uncover its dark secrets and break the curse.

Exterminate zombies in style with up to 4 players in this action packed co-op top-down shooter.

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

You and your friends can be part of the Z-Company. Defend Targets against huge hordes of zombies with all kinds of weapons and buildings in this Tower-Defense/Shooter hybrid.

Co-op horror for 1–6 players. Complete high-risk tasks in a vast shopping mall while evading relentless monsters. Hold the security room - or push out and make it back alive.

Dive into horror in Entities. Solo or up to 4-player matches offer dynamic puzzles, relentless entities, and extraction shooter mechanics. Investigate, unlock paths, and survive in dangerous zones as a private operator. Master skill and terror. Are you ready to confront the unknown?

SCP: Fractured Reality is a co-op VR horror shooter set in the SCP universe. Players must work together—as well as against each other—to survive the many horrors lurking in Site 97’s depths.

A survival horror PvE and PvP set in 1920's New York City! Team up with up to two others, or go in alone, and search creature-filled semi open-world map for arcane clues that lead you to a lucrative Bounty. Featuring permadeath consequences, only the best hunters will make it out alive..

A 4-person co-op horror game where teamwork is the key as players face malevolent demons in a mysterious mansion. An immersive experience with unpredictable AI that continuously changes and adapts to the players’ behavior. Can you conquer your fears and escape?

Sin Survivor is a wave-based, first-person co-operative or single-player shooter based in a post-apocalyptic world overrun with blood-hungry, satanic demons.

The office is under zombie attack! Recruit coworkers and survive the outbreak.

The world has fallen by zombies. As a part of the association, you are dispatched to the places where zombies are concentrated and stabilize these areas. Fill your backpack with the full of items, and eliminate zombies with the bullet hell.

A dark and moody top-down shooter. Unlock new weapons and upgrades by completing achievements, making each run different. Will you be able to escape the swarm?

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.

As a part of the Borderwatch team, scavenge, defend and survive against zombie hordes in this 3rd person action horror survival! Will you be able to see the daylight?

Armed militaries are requested to clean an area infested by zombies. On each round you don't now if you will be a zombie or a soldier, so use the skills and items that was given to you and keep alert.

Zombie Assault: Resurgence is an intense, action packed top-down shooter. Featuring deep RPG elements, customise your loadout with unique upgradeable weapons as you gear up to take on hordes of enemies. Play solo or team up in co-op with up to 4 players. 

Old Roots: fight your fear and survive your fate. Inspired by the geography of Siberia and with inspiration from games like Doom or Hellblade, you will have to face your own fear and overcome your enemies... without losing control.

What begins as a myth-busting adventure quickly turns into a terrifying fight for survival when the mysterious faceless creature reveals himself to be real. Explore, survive and uncover the truth in this 1-2 player co-op horror experience.

After Dark is a first-person endless wave zombie shooter set across multiple locations. Survive as long as you can against relentless hordes of the dead in a fight that only ends when you do.

Experience first-person horror and fight to survive in a chaotic landscape infested with bloodthirsty creatures.

Close your eyes. Step into a world filled with nothing but darkness and terror, where everything wants to destroy you. Your time has come to fight the shrieking darkness, be brave and don't look back or you won't make it.

Find yourself on a mission exploring the depth of an ominous forgotten mine. You arrive barehanded but quickly find the tools needed to go deeper. Destroy the infected living parts of the mine and face the final threat and complete your mission.

DEVOSE is a cooperative horror game for 1 to 4 players. Explore, find proofs and survive. Every corridor is a trap. Every noise can betray you. Coordinate or die alone.

A first-person survival shooter with apocalyptic simulation elements, focused on precision and headshot mechanics. Every shadow hides a deadly threat. Survive the night, manage your ammo, and fight off ever-increasing waves. Do you have what it takes to resist?

LAG KILLS is a single player / online co-op survival horror. Desperate and out of options, you break into what you thought was an empty house but little did you know the owner is home and is now hunting you. LOOT, HIDE, SURVIVE and ESCAPE.