Blue Archive

Blue Archive is a tactical role-playing game that allows the player to form and mobilize units of up to six members (two "Specials" and four "Strikers") with which to participate in various military campaigns.

Students' strengths can be enhanced in various ways, such as by increasing their levels, weapons, armor and skills. More students can be recruited through the gacha system using in-game currency, which may be purchased through in-app purchases.

Blue Archive takes place in the academic city-state of Kivotos, which was established by the union of thousands of academies. The citizens of Kivotos are composed of three races: Humanoids, which include subraces ranging from the common human to resembling angels, demons, elves, bioroids, and kemonomimi retaining lesser features of various animal races such as ears and tails; intelligent werebeast citizens of various races; and highly advanced robots with human levels of intelligence and individuality. Due to possessing Halos, humanoids are surprisingly strong and durable enough to resist and survive serious injuries like gunshots and explosions, though they can only be killed by destroying their Halo through certain means. As a result of this, every student possesses some kind of firearm and/or ordnance as a means to protect themselves and fight back against other students, with frequent campus shootouts happening quite a lot across Kivotos.

The city is ruled by the General Student Council (GSC), a federal committee led by a President, who governs the city from the Sanctum Tower with access to every student's register. Despite the GSC having the main authority within Kivotos, many of the schools operate and lead their districts with virtually autonomous independence with almost every school district having a rich, long-lasting history to them, with the three most powerful schools being Millennium Science School, Trinity General School, and Gehenna Academy.

The game was first introduced by Nexon Games (formerly NAT Games) and Yostar by its initial name, Project MX. The announcement, alongside the first promotion video and arts was released in February 2020. Yostar announced the mobile game and held closed beta tests for the Android version in July 2020, where it is now known by its current name as Blue Archive. Initially scheduled to be released in 2020, it was later moved to February 4, 2021.

A worldwide version of the game was announced in August 2021, surpassing one million pre-registrations ahead of its release. The version, which includes English as well as Korean, Traditional Chinese and Thai language support was released on November 8 of the same year by Nexon.