Under Night In-Birth II Sys:Celes introduces new characters and previously unavailable mechanics (Creeping Edge and Celestial Vorpal). Surviving an encounter with one of these beings grants supernatural abilities and the title of In-Birth. The game offers a variety of characters with different fighting styles and combat skills. Additionally, a gallery is implemented in the game, where players can view illustrations, including those of the characters. The game’s age rating does not take into account the difficulty level or skill required to play it. There are age requirements for playing the game.