Echoes of Aincrad is an original game set in the world of Sword Art Online, allowing players to assume the role of a background character who starts as a beta tester. The game features a prologue where players form an alliance with a solo player named Ito to combat player killers. The main storyline, which takes about three hours to complete, involves navigating the dangers of a game where death in-game results in real-life consequences. Players create their own character and experience familiar story elements while uncovering new narratives. The gameplay includes a mix of quests and environmental puzzles, though it suffers from repetitiveness and underutilized expansive worlds. Combat is satisfactory, with various melee weapons and coordinated attacks with party characters. The game is compatible with VR for an immersive experience.