High School of the Dead Day 0 is a free-to-play HTML5 browser gamedeveloped and published by CTW, Inc. for the G123 platform, based onthe Japanese manga and anime "Highschool of the Dead." Players take onthe role of Takashi Komuro and lead a party of the original cast throughstrategic tower defense battles against the undead while building andexpanding a survival base. The title combines tower defense mechanicswith RPG progression and gacha-based character collection, and runsdirectly in any modern web browser on PC or mobile devices withoutinstallation.
The game is set in the zombie-apocalypse world of the original"Highschool of the Dead" manga and anime by Daisuke Sato and ShoujiSato, in which Fujimi High School and the surrounding world have beenoverrun by undead creatures referred to in-universe as "Them." Playercharacter Takashi Komuro escapes the collapsing school with childhoodfriend Rei Miyamoto after his best friend Hisashi Igou is bitten andturns. The two join up with classmates Saya Takagi and Kota Hirano,kendo club leader Saeko Busujima, and school nurse Shizuka Marikawa,together attempting to survive in a hostile world.DAY 0 presents an original storyline written specifically for the gamerather than a retelling of the source material, so it does not directlyspoil major plot beats from the original work. Characters appear innewly drawn artwork with original outfits, and the game adds collectiblescenes exclusive to this adaptation. The international release ishandled through CTW Cayman Inc., and the game is published in Japan,Taiwan, Hong Kong, Korea, and other regions as a live-service titlesupporting Japanese, English, Traditional Chinese, and Korean.