The Under Night In-Birth series is a franchise of competitive 2D fighting games known for its deep mechanics and visual novel-style storytelling. The series reached a major milestone with the 2024 release of Under Night In-Birth II: Sys:Celes, which serves as a direct sequel and conclusion to the narrative. These games are published by Arc System Works and feature a diverse roster of characters fighting in the Hollow Night.
Co-developed by French-Bread and Ecole Software, the franchise debuted in Japanese arcades in 2012 before expanding to home consoles and PC. Early iterations, including
Under Night In-Birth Exe:Late and
Under Night In-Birth Exe:Late[cl-r], established the signature "Grind Grid" (GRD) tug-of-war mechanic, which rewards offensive and defensive precision during combat.
The culmination of this evolutionary path arrived with
Under Night In-Birth II: Sys:Celes (2024), alongside its premium physical
Under Night In-Birth II: Sys:Celes [Limited Edition] packages. This entry modernized the competitive framework by implementing rollback netcode and introducing new playable fighters like Kaguya and Kuon. The release of
Under Night In-Birth II: Sys:Celes also refined the series' complex meter management systems, such as "Veil Off" and "Celestial" states. Beyond its standalone entries, the intellectual property gained broader fighting game community recognition through character crossovers in the crossover title
BlazBlue: Cross Tag Battle.