[6] An English version of the game, available in both digital and retail format, was announced, and was released on April 28, 2015 in the United States and in Europe and Australia on 1 May 2015.

[8] Omega Quintet[9] takes place in a world that is being damaged by a phenomenon known as the “Beep” ("Blare" in the English version), which has been degenerating the life of humankind by affecting their minds.

[10] Kyoka has a strong sense of responsibility who does her job as a Verse Maiden while caring for others, and also has a hard time expressing feelings.

[11] The game features "costume destruction" in a manner similar to Senran Kagura, which happens when the girls get parts of their clothing torn off as a result of taking repeated damage from enemies.

[6] During the game's fights, its Voltage Gauge fills up when Takuto protects the idols when the player attacks the enemies.

[15] A further teaser was shown in August, featuring a sample of the game's music, including the tracks "Inchoate Voice," "Eureka," "Move*Menter," "Manmaru marui," and "Complex: Crescent".