A downloadable game for Windows

O is a tennis rhythm game for two players in which you can influence the rhythms your opponent has to receive.

Hit an invisible ball that can only be seen and heard through its impacts, going faster and faster!

Will you play against your partner in order to grab victory over them...
Or will you try to reach something more... together?


Open the "readme.txt" in the downloaded folder to get instructions on how to play the game.

Originally conceived as an immersive installation with LED screens and joy-cons, you can play this version on your own computer at home.


Player 1
Player 2
Flat hit

Joy-cons and xbox controllers are also supported.
(more informations in the readme)


Nathanael BROCH - Tech Artist
Roman GRZEGORZEWSKI - Game Designer
Lucas LACOUTURE - Programmer
Tom NOUET - Sound Designer

Student project from CNAM-ENJMIN

Rated 5.0 out of 5 stars
(5 total ratings)
AuthorsRoman Grzegorzewski - AmeSunshine, shertigan, Gurlu, Hooooooowler
Made withUnity
TagsAbstract, Experimental, installation, motion-control, Split Screen, Tennis, Two Player
Average sessionA few minutes
InputsKeyboard, Xbox controller, Joy-Con
AccessibilityBlind friendly, Textless
MultiplayerLocal multiplayer
Player count1 - 2


O.zip 43 MB


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(1 edit)

°O° (hello friend~)


Simple yet extremely satisfying gameplay. Visuals and sound design are perfectly balanced and it’s awesome to be able to play in the dark with the big led screens. thank you for this great experience!!

It's a real pleasure to be able to entertain you my dear friend, thank you for sharing your feedbacks : they made us smile ! ❤️


If you ever see this game at a festival or in your local arcade, push whoever is in front of you and get into the action. O is such a fun and interesting alternative controller game, which combines brilliantly all the fun of sports game like Mario and Sonic at the Olympic Games, and the satisfying flow of rhythm games like Beat Saber. It's simple to understand, you will have no issue getting it but the game is more fun when you find a partner you can really vibe with and get to the finish line with. The music is cool. The visuals are stunning. The reactivity is insane and very satisfying, and it's a unique experience you're not ready to forget!

Thank you for your O so great feedback Maraj :)

This kind of messages are very satisfying to hear. We really wish to make your first sentence comes true in the future and give to others what you experienced in our game !


I was among the few lucky ones to be able to play with the alternative controller and setup as designed. This rythm-based experience is really enjoyable and a demonstration of how a great design idea can make for a truly memorable moment. Highly recommended, great work ! :)


Thank you so much for this message !

We are really pleased to know you loved the game and its concept.

The game made such a great impression it will still be playable at the Cnam Enjmin, at the foyer magelis if you want to play again :D
(and maybe later at some festivals ? who knows eheh)