PC Games starting with the letter O

Delve into a curated collection of games that kick off with the letter O! Uncover a diverse range of titles spanning various genres and make sure your gaming experience is flawless by checking the system requirements for each game. From action-packed adventures to strategic challenges, these O-starting games promise excitement and entertainment. Upgrade your gaming setup, ensure your system meets the specifications, and embark on a gaming journey tailored to your preferences. Explore system requirements now and start playing the best O-themed games today!
_OUR_:_Defense - official thumbnail - system requirements guide
_OUR_:_Defense

Is a dynamic tower defense game. You must react and counterattack the enemies on the battlefield all the time. Fight off alien swarm attacks with gigantic machine guns, shotguns, gauss rifles and even a giant laser created using alien ...

[Obsolete]Beat Stickman: Infinity Clones - Definitive Edition - official thumbnail - system requirements guide
[Obsolete]Beat Stickman: Infinity Clones - Definitive Edition

An action-packed clicker idle game with an interesting little story. Expect beating, clicking, collecting, grinding, violence, explosion,...and stuff.

// OVERDRIVE - official thumbnail - system requirements guide
// OVERDRIVE

// OVERDRIVE is an addictive arcade fast-paced procedural shooter rogue lite. Clear each procedurally generated rooms, loot some precious upgrades and fight bosses! Enter your name in the glorious online leaderboards.

>observer_ - official thumbnail - system requirements guide
>observer_

What would you do if your fears were hacked? >observer_ is a cyberpunk horror game from Bloober Team, the creators of Layers of Fear. Play as an Observer, the new front line of neural police, as you hack into the jagged minds of the insane.

>one way - official thumbnail - system requirements guide
>one way

In More Than "one way" face the internet horrors that haunt your past. The one's you've never heard of. They don't exist.

O Holy Knight - official thumbnail - system requirements guide
O Holy Knight

Master the art of formation and lead your medieval squad in strategic battles. Command, level up, and triumph over monstrous waves in this thrilling roguelite adventure!

O Rei - official thumbnail - system requirements guide
O Rei

Do you want to reign?

o---o - official thumbnail - system requirements guide
o---o

An arcade game styled after classic titles of the first generation of consoles. Gameplay set in the cybernetic sphere, accompanied by electronic music matching the game's visuals.

O! STRELALKA!!! - official thumbnail - system requirements guide
O! STRELALKA!!!

Near space, the future, 2020. Sudden attack of aliens destroyed the house, everywhere malicious enemy ships, you jump into your combat spaceship and ahead to destroy the invaders. Your task is to destroy all ships and be saved. Stars like ...

O.A.C - World Begins - official thumbnail - system requirements guide
O.A.C - World Begins

Are you a leader? Once you convince your nation you are their leader, it will be time to show the world your own political, people management and military strategy skills. O.A.C aims to be a breath of fresh air in the grand strategy genre ...

O.C.D. - On Completeness & Dissonance - official thumbnail - system requirements guide
O.C.D. - On Completeness & Dissonance

Fill the empty slots in each pattern by rotating the board to make the loose tiles slide into position, but beware: the painful sight of a misplaced tile will bluescreen your brain.

O.D.T.: Escape... Or Die Trying - official thumbnail - system requirements guide
O.D.T.: Escape... Or Die Trying

Fight your way through incredible, multi-leveled, 3D worlds while searching for magical, green pearl that will help save millions from decimation. O.D.T. leads you deep into a mysterious tower full of hideous enemies and hidden dangers - ...

O.M.S - official thumbnail - system requirements guide
O.M.S

O.M.S is a casual story-driven 2D Sci-Fi Platformer where you control L10 as his world is threatened by SIMPHONY the very AI that powers his planet. L10 will be avoiding dangerous obstacles and enemies as he hopes to repair SIMPHONY and ...

O.R.B. Offensive Rolling Bot - official thumbnail - system requirements guide
O.R.B. Offensive Rolling Bot

Lead O.R.B. to save our world from total annihilation in this thrilling 2D-platformer. O.R.B. is a robot sent from the future to destroy an evil A.I. DiOS before it can fulfill its evil plan. O.R.B. has some special skills, and ...

O.V.N.I. Abduction - official thumbnail - system requirements guide
O.V.N.I. Abduction

Face terrifying enemies from another planet who want to stop you at all costs in this first-person adventure. Explore terrifying and dark settings, solve puzzles and use the objects you find on the map to progress in your adventure.

O'Fox Life - official thumbnail - system requirements guide
O'Fox Life

O'Fox Life - Platformer, the main character is a Fox. In the game you have to help the main character to take a long way home.

O2Jam Online - official thumbnail - system requirements guide
O2Jam Online

From the iconic songs to customizing your game UI and new tracks available to play! O2 Jam is now available on Steam~!

O2Jam x DancingParty - official thumbnail - system requirements guide
O2Jam x DancingParty

FPS VirtualReality game that draws patterns of notes that fly with rhythm and timing This game is a rhythm game that hits the ball at the exact moment. Let's play with the dancers in front of us to the rhythm. Let's play rhythm games with ...

O3DX - official thumbnail - system requirements guide
O3DX

Prepare yourself for fast tracks, furious physics and a rush of adrenaline as you tackle daring obstacles and puzzles. O3DX will be the ride of your life!

o7 - official thumbnail - system requirements guide
o7

o7 is an infinite vertical scroller where the floor is Lava, you have to go up as fast as possible and try to stay alive.