Blue Archive (Korean: 블루 아카이브, romanized: Beullu Akaibeu) is a free-to-play real-time strategy role-playing game developed by South Korean developer MX Studio under the management umbrella of Nexon Games (formerly NAT Games), a subsidiary of Nexon. It was released in 2021 for Android and iOS, first in Japan by Yostar and worldwide later that year by Nexon.[2] The game is free-to-play with gacha game mechanics as a means to obtain new characters and improvise strategies.