Under Night In-Birth is a fighting game series developed by French-Bread and Ecole Software. Initially published in arcades by Sega in 2012, Arc System Works assumed publishing duties after the game's first home console release in 2014. The first entry in the series, Under Night In-Birth, was released exclusively as an arcade game using Sega's RingEdge 2 arcade board on September 20, 2012 by Sega in Japan. In March 2013, support for Sega's ALL.Net P-Ras Multi service was added.[11] A major revision, subsequently entitled Under Night In-Birth Exe:Late (アンダーナイトインヴァースエクセレイト, Andā naito invāsu ekusereito), was released on September 9, 2013. This updated version of the game would receive a port published by Arc System Works for PlayStation 3 in Japan on July 24, 2014.[12] A 2015 release for North America and Europe was later announced,[13] with the North American version published by Aksys Games on February 24, 2015 and the European version released by NIS America on February 27, 2015. Exe:Late was released on Steam for Microsoft Windows systems on July 12, 2016. A further update to the game entitled Under Night In-Birth Exe:Late[st][14] was announced on May 15, 2015.[15] Under Night In-Birth Exe:Late[st] was released on PlayStation 3, PlayStation 4 and PlayStation Vita in Japan on July 20, 2017,[16] and in North America and Europe on February 9, 2018.[7] Arc System Works later published this version on Steam for Microsoft Windows systems on August 20, 2018.[17] A final revision of the game, entitled Under Night In-Birth Exe:Late[cl-r][18], was announced on August 3, 2019 at Evolution Championship Series. It was released for the PlayStation 4 and Nintendo Switch on February 20, 2020 in Japan and North America and February 21, 2020 in Europe.[19] A version for Steam for Microsoft Windows was released on March 27, 2020, superseding the Exe:Late[st] release from 2018.[20] The PlayStation 4 and Steam versions of Exe:Late[st] received updates to match the contents of this revision, while those who purchased the PlayStation 3 version were eligible to upgrade to the latest version via a limited-time discount, which ran until April 30, 2020 in Japan and North America, and April 31, 2020 in Europe. New content exclusive to Exe:Late[cl-r], such as a new playable character and additional character palettes, could be added to Exe:Late[st] through the purchase of paid downloadable content.[21] The game was released for Amazon Luna on January 21, 2021.[22] An arcade port of Exe:Late[cl-r] using Sega's ALL.Net P-Ras Multi service was released on April 15, 2021.