Sword Art Online is an MMORPG within its world that turns into a death game where in-game death leads to real-world death. The 'protagonist,' one of the players trapped in the virtual world, reunites with the swordsman 'Iori' whom they met during the beta test. This game is an RPG that depicts the anguish and conflict of players trapped in a virtual world where death lurks within the floating castle of Aincrad.

Along with the release announcement, the 'Echoes of Aincrad' release trailer was revealed. The trailer conveys the full story of the 'SAO Incident,' which involved approximately 10,000 people, through the perspective of the survivor, Iori. Additionally, to commemorate the release, a special visual drawn by Abec has been unveiled. This visual features Kirito, Asuna, and the original characters appearing in this work against the backdrop of the floating castle of Aincrad.