Top similar games like OSIRIS:

A fast-paced sci-fi First Person Shooter inspired by the classics of the genre. Shoot and kick your way out of the war-torn planet to survive the attack of the space undead. Zombie blood has never splashed so good!

Relive Half-Life.

Cosmic VR Action Horror focusing on intense shooter action, twisted sci-fi anthology stories and disturbing atmospheric dread. You’re marooned alone in the Bermuda triangle of space, filled with ancient derelicts and ravenous aliens: By Grit Alone, you will survive.

An atmospheric, story-driven sci-fi FPS set in Antarctica in the 1990s. Explore an isolated facility, solve environmental puzzles, uncover secrets and fight through increasingly intense encounters using a diverse range of weapons and powerful combat abilities.

Gynophobia is a horror themed shooter about abnormal fear of women. Gynophobia is using classic first person shooter gameplay, to convey story about Mark, who is suffering from different phobias, including abnormal fear of woman.

Sewer is a survival horror experience that drags you beneath Arras in 1915 as a British spy trapped in a cursed underground. Navigate shifting tunnels, manage scarce ammo, and face what should have stayed dead as you fight to escape the darkness.

DelayedSun is a third-person shooter survival horror game set in a post-apocalyptic world filled with flesh-hungry zombies. Craft items, gather resources, upgrade your skills and prepare your gun to fight!

To escape this terrifying hospital, you must leave your fears behind. Can you do it? Explore, face zombies, use weapons, avoid traps, and react fast to survive.

Hell’s armies have invaded Earth. Become the Slayer in an epic single-player campaign to conquer demons across dimensions and stop the final destruction of humanity. The only thing they fear... is you.

The space station has undergone an unknown contamination from space, the previously unknown X virus mutates, almost the entire station crew is infected, you need to stop the army of mutants before they break through to Earth and doomsday began!

Enter this first-person shooter with dark and realistic scenarios, use your shooting skills to kill all the enemies and survive. Explore the scenario and collect all the resources you can because you will need them to get out alive.

Flee the shattered ruins of the Moscow Metro and embark on an epic, continent-spanning journey across the post-apocalyptic Russian wilderness. Explore vast, non-linear levels, lose yourself in an immersive, sandbox survival experience, and follow a thrilling story-line that spans an entire year in the greatest Metro adventure yet.

Red Lake - horror shooter with elements of quest.

Nachtfrost is a round-based WWII zombie survival shooter. Play alone or with up to three friends across six haunted wartime maps: board the windows, restore the power, earn points for perks and weapons, and survive the dead for as long as you can.

Survive or die ! Experience survival horror full of puzzles while escaping between the streets of Algeria after zombies invasion . Suffer to protect your life in situations never attempt them before with first person perspective and powerful actions that make it more realistic then ever

Wolfenstein®: The Old Blood™ is a standalone prequel to the critically acclaimed first-person action-adventure shooter, Wolfenstein®: The New Order. This adventure spans eight chapters and features the hallmarks of MachineGames – thrilling action, immersive story, and intense FPS combat.

MIST SURVIVAL is a Single-player, survival stealth sandbox game Players will experience the Apocalypse stimulation in the form of virus pandemic, the players have to deal with it to survive through the difficulties such as finding shelter and food, threats from the environment and climate: wild animals, bandits, infected, and dense mist t

In this game you have to fight your way through hordes of zombies in search of a safe place.

A demonic invasion has overwhelmed the Union Aerospace Corporation's Mars research facility. As one of only a few survivors, you must fight your way to hell and back against a horde of demons in this award-winning horror/action FPS and reimagining of the original DOOM.

In this retro PS1/PSX style game. Play as a investigator stranded in a zombie and monster filled mansion and forest. You will encounter horrifying creatures ready to devour you alive. All while trying to make your escape and discover the terrifying truths before it's to late. Will you survive?

Dark Places is a psychological single-player game set in a surreal world filled with horrific creatures and nightmarish delusions. Solve puzzles and try to survive.

Buried Alive: The Annihilation is an immersive and intensive VR shooter. Survive and uncover the truth in the Annihilation!

【Can you live with this fear?】 A horror game developed by a Japanese high school student all by himself is coming to Steam! Escape the monster's pursuit in the creepy mansion, sometimes using weapons to fight back and find the key to escape!

Dead Effect 2 is the newest addition to the acclaimed Dead Effect franchise. This action sci-fi shooter is looking to push the boundaries of first-person shooters to new levels with slick graphics, rich narrative and RPG elements.

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.

Miss shooting zombies? Here you go! A round-based zombie shooter for one player, in a boarded-up graveyard house and a snowbound village in 1944. The dead come in rounds, more of them each time. Buy guns off the walls, find the power, spin the Lucky Wheel, and see how long you can hold out.

Humanity's ambition for the stars turns into a brutal fight for survival. The crew of The SS Destiny discovers a bacteria that turns their mission into a nightmare. Find resources, battle infected, and escape the doomed ship as it spirals into chaos.

You are following the story of security guard working at power plant which uses experimental technology, designed to draw electricity from atmosphere. One day you start hearing strange stories about anomaly sightings, soon you witness something terrifying...

MUTATION PHASE is a horror-shooter with a first-person view, which narrates the consequences of experiments with sound waves. You have to survive among hordes of mutants and get out of the danger zone.

An action packed sci fi FPS set aboard a massive spaceship, where reversing gravity changes the way you fight and the environment helps you eliminate enemies.

You are Isaac Clarke, an engineer on the spacecraft USG Ishimura. You're not a warrior. You're not a soldier. You are, however, the last line of defense for the remaining living crew.

Wake up in a zombie-infested laboratory, uncover the truth behind the disaster, and fight to survive in an intense experience of horror, action, and mystery.

A gritty realistic first person horror that immerses you within a claustrophobic forest haunted by it's former residents. Survive as long as you can scavenging and creating traps with help from your drone "Daisy". Grotesque and unrelenting monsters, and unfathomable terror seep into the roots here.

Kyle wakes with a headache unaware he has survived a helicopter crash in Nannestak Norway. Alone on a farm he suddenly finds himself in a space suit. A flash of light transports him back to a mission he must complete. As he progresses he experiences flashbacks uncovering pieces of his lost memory,

Fight for your life in the INDIE SCI-FI FPS game fit for both casual and hard-core gamers with a passion for hunting down hordes of zombies. Prepare yourselves for the incoming nightmare!

Now includes all three premium DLC packs (Unto the Evil, Hell Followed, and Bloodfall), maps, modes, and weapons, as well as all feature updates including Arcade Mode, Photo Mode, and the latest Update 6.66, which brings further multiplayer improvements as well as revamps multiplayer progression.