Top similar games like OSIRIS:

Within the Cosmos is a single-player first-person sci-fi RPG. You awaken from cryogenic sleep, and shortly after, you and your crew get attacked by an unknown enemy. As you explore multiple planets to try to find answers, your choices and actions will determine how the story unfolds.

RETRO RAMPAGE FOR PC! Set in the town of Frontier, Missouri, in the 1980s, young man called Mark finds a prototype of VR-glasses. And to his surprise, the glasses are compatible with his Amiga 500. He launches a game and step in to an incredible adventure..

Inspired by classic survival horror. Bachman Manor sprawls into a maze of corridors, bedrooms, foyers, and more. Filled with puzzles, traps, and hidden passageways that explore the secrets of its dark history and occupants.

Dead Purge: Outbreak is a modern first-person shooter set in an unforgiving post-apocalyptic world where every minute can be your last.

Blood Metal is a brutal, experimental, single-player project featuring a full body-destruction model. This was one of the first games I ever created with my Youtube community. Please enjoy it completely for free on Steam.

A secret city existed where unknown bioengineering experiments were conducted. The city was filled with scientists, engineers, and mercenaries serving the interests of a shattered syndicate now competing for control of City. The area has become a warzone, harboring unspeakable horrors.

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.

Putrefaction is a First Person Shooter with horror elements, lots of enemies and weapons, heavily inspired by old-school shooter classics.

Perilous Warp is a fast-paced indie retro-shooter inspired by the classic 3D-actions. Communication with a distant space colony has been lost, and you bravely step into the teleporter with the desire for glorious adventures. But do not expect to win in a heartbeat!

Survive the terrifying events on Angstrom Station.

After losing contact with a space station on mars, you are sent to retrieve a high value item for the company. It didn’t take very long for our protagonist to find out that something went very very wrong in this place. Use stealth to get past your enemies or run for your life hoping that they don't catch up and explode in your face.

Prodeus is a first-person shooter of old, re-imagined using modern rendering techniques and technology. Experience the quality you’d expect from a modern AAA game, designed with retro aesthetics and gameplay that invoke the tech-imposed limits of older hardware.

Cosmic pilot has lost his ship on the remote asteroid populated by disaster human colony. Hungry zombies, villainous mercenaries and monsters are everywhere. Only you ... and his awesome arsenal could lead hero to freedom.

Red Lake - horror shooter with elements of quest.

DOOMED is a First Person Shooter with horror elements, heavily inspired by old-school shooter classics.

The Cross is the most Scary Survival horror game with creepy witch monster and ghosts.

You find yourself in Backrooms, and it's up to you to find a way out of this place. You are completely lost, in a world of endless corridors and liminal spaces. And no one knows what's waiting for you around the next corner.

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.

Continue your journey through Bachman Manor as you inch closer to freedom, or towards your mysterious friend Christina and her candle-lit secrets. Going deeper into the estate reveals more locations like the Abandoned Wing, Lower House, and the bunker complex "Salvation".

Kontrakt is a hyper-violent action-adventure game about schizophrenia with a dark and twisted story. You will assume the role of a hitman involved in mysterious contract killing, while uncovering the dirty truth and secrets behind the City of Light.

Welcome to Masked Forces 3, the ultimate FPS simulation! This is a game where you can test and improve your shooting capabilities against multiple game modes.

Old school classics with the new twist.

16-bit love letter towards survival horror past and present. Chloe and her two children will embark on a journey to find her missing husband before the whole town descends into hell.

How hard is it to press the button that activates weapon capable of ending our entire civilization? How to control the arsenal of "The Last Day Weapons"?

Hardline of sci-fi survival on Space Station! Craft, Research, Explore and Fight against evolving mutants. Interesting open world and big sectors to explore! Manage the entire colony single-handed! Can you survive long enough to escape the horror?

This game is only for those who willing to take challenge or hurt themselves.

Become the ultimate badass in Trepang2: A gory, action-packed FPS set in the near future. Unleash all hell on your enemies, dodge bullets and leave a trail of destruction in this hardcore and frenetic shooter.

A Sci-Fi FPS that sends the player to a war between good and evil. Experience hordes of monsters, a gloomy moon base setting, mighty weapons, intense action and a lot of fun in VR.

In the game MONEY LOVES SILENCE, you’re a bank employee and it’s your job to go after debtors. Everyone’s past catches up with them at some point and you’re no exception. You’ll need to help yourself when this happens. Buy everything you need and get ready to head out on an adventure.

【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!

Alice returned to her hometown after a long journey. But nobody was there. Save the inhabitants and defeat the leader of the gang.

Slip into the Standard Issue Biosuit as Myo Hyori, a gifted Korean teenage girl who must face the perils of the future. Survive many hazards, explore a seemingly endless metropolis and beyond as the world around you implodes and history marches towards its inevitable conclusion.

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

Created by Savage Studios, S.C.A.R is a retro-like monster killing game, where the enemies have one goal, to see your demise. Difficulty is not forgiving, your survival is almost impossible...

Gorytale is a fast-paced, adrenaline-rushed FPS shooter set in a candy land, that is so damn sweet it could be called someone’s Hell

Wrong turn, wrong place. Now you are in the middle of nowhere, surrounded by horde of faceless creatures... and you are very short on ammo.