オセロ - オンライン　大人気の無料オセロ対戦ゲーム

The definitive free-to-play, authentic Othello game.
Beginners and advanced players alike can hone their skills through AI challenges and online battles.
Immerse yourself in the world of Othello while having fun with family and friends.

Unbelievably easy to play! Introducing the official Othello™ game app, boasting the highest total number of matches! Othello, also known as Reversi, is a Japanese board game. Its appeal lies in the strategic battles played on an 8x8 board. Experience the deep world of strategy and mindfulness with this Othello game!

[Enjoy a Free, Authentic Othello Game]

This Othello game is completely free to play. No registration is required, so anyone can start playing right away. It's designed to be casual and enjoyable for beginners and advanced players alike. It offers a full-fledged gaming experience despite being free.

[Expand the Othello World with a Variety of Modes]

Complete with single-player, two-player, and online battle modes! This free Othello game lets you compete in real time against players from around the country and with friends.
Use your strategy, outwit your opponent, and seize victory. Experience the depth of Othello with a variety of modes.

[Includes AI Othello Commentary Mode]

The industry's first AI commentary mode delivers a immersive gaming experience, even when playing alone. AI commentary adds excitement to the game, making it feel like a tournament, even though it's free.

[Free Othello that can be played offline]

Another great feature is that it can be enjoyed without an internet connection. Play Othello anytime, anywhere, such as during your commute or while waiting. As a free offline game, it's also perfect for exercising your brain and improving your concentration.

[Beginner-Friendly Controls and Design]

Even beginners can play Othello with ease. This free game is easy to play, with simple controls that anyone can easily master. Detailed explanations of the rules and tactics ensure natural improvement, even for beginners. Enjoy it with peace of mind, even with your family and children.

[The Strongest Othello AI, "HAYABUSA"]

Introducing the AI ​​"HAYABUSA," boasting incredible thinking ability! Enjoy a professional-level gameplay experience with this high-quality Othello game, hard to believe it's free. Battle against AI to hone your strategic skills and become a true Othello expert.

[Rediscover the Charm of Othello]

Othello is a deep board game with simple rules, yet with limitless strategic possibilities. Enjoy the thrill of reading your opponent's moves and intuition with this free Othello game. It boasts a level of perfection that can be enjoyed by players of all ages, from beginners to advanced players.

◆Examples of Othello Fun Scenarios

On the Commute: Play a quick game of Othello while commuting.
While Waiting: Play Othello for free even while waiting in line.
During Breaks: The perfect time to refresh.
With Friends: Have fun playing competitive Othello games together.
At Home: Play Othello with your family for a fun, free game.
Evening: Relax before bed with Othello.
While Traveling: Play a hassle-free game while on the go.
Competition: Test your skills with the ranking feature.

◆For those who want to play against the strongest AI

・For those who want to enjoy free Othello against the strongest AI that's been talked about on TV
・For those who want to hone their Othello skills by playing against AI
・For those looking for a game that allows them to challenge the most difficult AI
・For those who want to learn tactics through playing against AI
・For those who want to enjoy authentic AI-powered Othello on their smartphone

◆Play Online or Offline

Battle Othello against players from all over the country in online matches! You can also practice against the AI ​​in offline mode. Both are versatile board games that can be enjoyed for free.
Perfect for two-player play with family, lovers, or friends. Even beginners can easily get started, making them popular.

◆Differences between Othello and Reversi

Othello is a Japanese board game invented by Goro Hasegawa in 1973.
Unlike Reversi, it features alternating black and white pieces as the initial placement. Both games use an 8x8 board and are loved worldwide for their deep strategic depth.
(R)Othello is a registered trademark of MegaHouse.