Oscar & Gems: Puzzle Quest

(06/03/2021)

• Adventure
• Casual
• Arcade
• Puzzle

Play the new mach3. Beware of food with spikes and eyes!

Oscar Mike VR

(30/11/2016)

• Action
• Early-Access
• Multi-player
• Shooter
• FPS
• Indie

Oscar Mike VR is a fast paced 5-on-5 FPS game for the Vive. Players can play as the International Special Forces or the Fifth Column. OM:VR features realistic maps and weapons that make the players feel immersed in the action.

OscarWildeCard

(01/03/2023)

• Casual
• Strategy
• Card-Game

He loves dinner parties. He doesn't love you. A most amusing card game.

Oscillate

(21/02/2021)

• Action
• Adventure
• Early-Access
• Multi-player
• Sports
• Racing
• Remote-Play

Start your racing career by enjoying the beauty of speeding, rushing & darting with your friends in versus mode or in a fun online multiplayer. You can also go solo if you want to. Are you ready to rush around the globe?

Oscura: Lost Light

(23/02/2015)

• Adventure
• Indie

Oscura, the apprentice lighthouse keeper, has destroyed the Aurora Stone, sending shards across the Driftlands and plunging them into darkness and danger. It’s up to Oscura to find the shards of the stone and restore light to the Driftlands before creatures of the dark can destroy it.

Oscuria - The world of nightmares

(31/05/2021)

• Action-Adventure
• RPG
• Simulation
• Action-Rpg
• Indie

There is another world, darker, more frightening. A world that is about to be completely invaded by nightmares. Zeyk and his friends find themselves by chance in this parallel reality in which they will have to face their greatest fears to prevent the unchallenged domination of nightmares.

Oscuro Blossom's Glow

(01/01/2025)

• Casual
• Puzzle
• Platformer

Join Selene in a charming platforming and puzzle adventure, where her ability to absorb and emit light from various flowers is key to activating mechanisms, overcoming obstacles, and navigating through environments that adjust depending on how you wield the light.

OshiRabu: Waifus Over Husbandos

(26/02/2020)

• Adventure
• Remote-Play

"—I wanna marry you." Those simple words set in motion a ♀ yuri ♀ game of cat and mouse!

OshiRabu: Waifus Over Husbandos ~Love･or･die~

(28/07/2021)

• Adventure
• Singleplayer

"A shotgun wedding?! Will the brides make it down the aisle?!"

OSIRIS

(22/04/2019)

• Action
• Adventure
• Early-Access
• Shooter
• FPS
• Indie

Dark history about OSIRIS corporation, which performs experiments in the field of teleportation of human souls to the Heaven on the artificial planet G6. Inspired by Deep Dark Dubstep music.

Osiris: New Dawn

(17/01/2023)

• Action
• Singleplayer
• Open-World
• Building
• Co-op
• Sandbox
• Indie

Osiris: New Dawn is an unforgiving near future space survival game with a cinematic feel and elements of horror. Play as a Mission Specialist in single or multiplayer to build your planetary base, pilotable vehicles, and controllable drones as you explore a dangerous solar system far from Earth.

Osiris Quest

(12/05/2025)

• Singleplayer
• Action
• Adventure
• Indie

Play as Horus in Osiris Quest, a retro-inspired 2D platformer set in mythological Egypt. Recover Osiris’s scattered remains and defeat the evil Seth to reclaim the throne. With pixel art, tight platforming, and a 16-bit soundtrack, experience a nostalgic journey built by a solo developer.

OSK - The End of Time

(19/09/2019)

• Action
• Adventure
• Action-Adventure
• Puzzle
• Platformer
• Indie

OSK is a stylishly brutal platformer in which you climb an enormous tree, up towards the sky as a squirrel escaping the chaotic apocalypse down below.

Osman Gazi

(17/09/2020)

• Action
• Singleplayer
• RPG
• Simulation
• Open-World

Osman Gazi 3D RPG Game

Osminog Adventures - The Lost Island

(07/12/2022)

• RPG
• Simulation
• Open-World

Dive into the fantastical world of Karawark and accompany the Pirate Crew of The Osminog on an adventure they were not prepared for.

Osmos

(17/08/2009)

• Casual
• Singleplayer
• Strategy
• Arcade
• Puzzle
• Indie

Enter the ambient world of Osmos: elegant, physics-based gameplay, dreamlike visuals, and a minimalist, electronic soundtrack. Your objective is to grow by absorbing other motes. Propel yourself by ejecting matter behind you. But be wise: ejecting matter also shrinks you. Relax - good things come to those who wait.

OS:Path

(18/04/2018)

• Puzzle

Small but tricky indie game to spend your evening on playing. You'll have to determine the cause of a program's critical error and restore its modules by playing mini games and solving puzzles while using the console.

Osseous And Swordy

(23/09/2023)

• Action
• Adventure
• Platformer

Osseous And Swordy is a 2D game that tasks players with outlasting an ever-evolving horde of monsters. With the coins falling from each enemy you kill, you can strengthen your sword, your health bar or your shield. Can you reach the last level and finish the game in this HELLISH game to play?

Ossuary

(26/05/2015)

• Puzzle

Fall into the place of bones. Urge on the stagnant residents who are lost to corrupt virtue. Use sins as your tools to improve their existence. Expose the cabbages pretending to be people. Learn about the razor blades hidden in your walls.

Ostalgie: The Berlin Wall

(24/03/2018)

• Strategy
• RPG
• Simulation
• Indie

The confrontation between the East and the West is coming to an end, but not between East and West Germany. The old party leaders are still sitting in their offices, not changing anything and waiting for exclamations from Moscow. But their end is close – Gorbachev and Kohl have already decided...

Ostallian Core

(16/07/2024)

• Action
• Arcade
• RPG
• Simulation
• Shooter
• Beat-em-up

A modern omnidirectional space shooter with colorful retro-style ASCII art and light RPG elements, featuring optional permadeath.

Osternfield

(03/04/2019)

• Casual
• Indie

Little point and click adventure with easter bunnys.

Osteya

(19/11/2015)

• Adventure

Osteya - the city which once was home to many people over the centuries. According to historians, there is a legend that Osteya stuck in time between worlds.

Ostranauts

(09/09/2020)

• Singleplayer
• Simulation
• Open-World
• Survival
• Sandbox

Ostranauts is a hardcore noir space-sim. Manage life aboard your ship, and beware the cost of every decision you make. Scavenge and explore the boneyard. Create, build, and customise your ship. Hire a crew to help but remember, nothing is more certain than death and taxes.

Ostrich Farm

(30/04/2025)

• Casual
• Indie

Sunshine graces the farm and your birds are a fashion disaster. Breed vibrant ostriches and complete orders by producing the requested colors and patterns. Earn valuable rewards and enhance your farm's genetic diversity. 🌈🥚🐥

Ostrich Island

(07/01/2015)

• Adventure
• Casual
• RPG
• Simulation
• Multi-player
• Platformer

Don't be an ostrich, play Ostrich! Gain experience points and unlock new skills and achievements! Feel creative? Create whole new islands and share it with community!

Ostrich Run

(08/10/2024)

• Action-Adventure

Ostrich Run is a game where you guide a horde of ostriches out of a lab. Take every ostrich you can and avoid the multiple hazards on your way out. The ostriches will help you break harder windows and rescue more ostriches. Make sure to save them all!

Ostrich Runner

(08/12/2020)

• Casual
• Singleplayer
• Arcade
• Multi-player
• PvP
• Racing

Ostrich Runner – is the fascinating animated arcade racing where the main heroes are funny and a little bit crazy ostriches.

Ostriv

(18/03/2020)

• Singleplayer
• Strategy
• Survival
• Building
• Sandbox

Ostriv is a city-building game that puts you in a role of a governor of an 18th century Ukrainian town to challenge your creative skills and management abilities.

Ostrofa

(04/02/2020)

• Action
• Early-Access
• Massive-Multiplayer
• Indie

Be prepared to survive in a custom-generated, low poly environment, fighting against other players from all over the world.

Ostrom

(18/12/2024)

• Early-Access
• Shooter
• FPS
• Indie

Realistic point defense game with physical interactions.

Osy Osmosis

(19/03/2017)

• Adventure
• Casual
• Indie

Osy Osmosis is a fun game for all ages where you must help Osy stay safe as she navigates through her world collecting stars. To help Osy, you will use osmosis to keep her in balance with the world around her.

Osylla

(09/09/2021)

• Adventure
• Action-Adventure
• RPG
• Simulation

Osylla is a horror game based on real events. Try to escape from your own house and help your mother to get medical help. Are you able to help everyone in the household?

Otaku Club

(28/03/2021)

• Casual
• Singleplayer
• Simulation
• FPS
• Indie

Otaku Club is an addicting game in which you have to solve puzzles with Lovely Girls.The game is perfect for relaxing.

Otaku Engine

(30/11/2022)

• Singleplayer
• Open-World
• Building
• Sandbox

Explore, build, and share virtual galleries created from your favorite hard drive or website images.

Otaku Miracles

(20/03/2025)

• Adventure
• RPG
• Simulation

A story about you, an anti-social Otaku who is a student at Ashikaga Academy, a very traditional private high school in Japan. Suddenly, you awaken in a place called the Spirit Realm and are tasked with saving the world! How? Well, with the help of your friends of course!

Otaku's Adventure

(19/05/2019)

• Adventure
• Singleplayer
• Puzzle
• RPG
• Simulation
• Indie

"Otaku's Adventure" is a different kind of AVG.The story tells of an Otaku who has been single for many years and thirst for love. While he inadvertently embarks on a fantastic journey, he eventually wins girls' love. The game combines storytelling with alternative TAKAGISM, and mini-games.

Otaku's Rage: Waifu Strikes Back

(22/02/2021)

What if this whole world of humiliation and suffering was just a nightmare? And instead, you are the Hero of the World of Waifu.

Otawamure

(17/07/2019)

"Otawamure" is a Japanese word meaning "to play around, to fool around or to toy with". Play with tender objects in this virtual space and experience “otawamure” for yourself.

Otem's Defiance

(24/04/2016)

• Action
• Platformer
• Indie

You play as Otem, a child who has been chosen as a sacrifice to the gods of his tribe. As they materialize in the center of the ring-shaped arena, you must dodge their attacks and fight back to survive the ritual and uncover the secrets of this gruesome tradition lead by the mysterious Shaman.

Othello

(18/03/2015)

The classic abstract strategy game comes to Steam! Othello is an ageless game that takes a minute to learn and a lifetime to master. Place tiles surrounding your opponents tiles to flip them to your color. Get to the end with more tiles of your color and you are the winner!

Othello 2018

(20/06/2018)

• Casual
• Indie
• Remote-Play

The classic version of the famous board game Othello.

Othello Let's Go

(18/08/2020)

• Casual
• Singleplayer
• Strategy
• Multi-player
• PvP
• Board-Game
• Co-op
• Remote-Play

Othello Let's Go is a beautifully designed strategy board game for all ages. A total of 8 levels of computer AI difficulty, suits for both beginners and experts! More than 100 carefully selected Endgame and Lights Out levels are waiting for you to solve!

Othello：Daynight Time Clash

(12/06/2022)

• Casual
• Strategy
• RPG
• Simulation
• Early-Access
• PvP
• Board-Game
• Sports

Transcending time and space -- Nymphs from all dimensions, emerge and engage!Let's Othello!

Other

(23/06/2022)

• Action
• Casual
• PvP
• Board-Game
• Card-Game
• Indie

Challenge your friends in Other ! Collect 5 letters to eliminate your opponents, be the last player alive to win !

Other Realms: Dwarves & more Dwarves

(24/10/2021)

• Adventure
• Casual
• Strategy
• Multi-player
• Open-World
• PvP
• Survival
• Building
• FPS
• Sandbox
• Massive-Multiplayer
• Indie

Other Realms: Dwarves & more Dwarves is a dwarves based survival multiplayer game. Craft and build your kingdom piece by piece for your dwarves. Set foundations, forge devices and conquer your dwarven realm.

Other Side Of Mist And Mountain

(27/03/2024)

• Adventure
• Puzzle
• RPG
• Simulation
• Indie

In 2005, a sophomore student named Maha Igarashi boarded a private train to Soukyo City. However, she vanished upon alighting at the "Kisaragi" station. Five years later, her lover, Shizuno Yokoyama, initiated an investigation into her disappearance, unraveling a series of mysteries along the way.

Other Submarine

(03/10/2019)

• Puzzle
• Indie

Trapped at the bottom of the ocean, you only have your trusty flashlight and a reliable submarine. Can you reach the surface before what lies beneath takes you?

Other Worlds India

(19/01/2017)

• Action
• Adventure
• Casual
• Action-Adventure
• Early-Access
• Multi-player
• Open-World
• Platformer
• Sandbox
• Indie

Pure metroidvania game, adventures, secret locations, tons of weapons, and of course hardcore gameplay.

Othercide

(26/07/2020)

• Singleplayer
• Strategy
• Indie

As Humanity’s last hope, lead your army to combat in an intricate dance of spectacular actions and counters, using an original Dynamic Timeline System, and face fearsome bosses in epic battles.