Devilman - Night Before Armageddon is a mobile game developed by Bandai Networks Co., Ltd. in collaboration with Kodansha Ltd. It was released in Japan on January 26, 2001. The game requires the players to be connected to the server of Bandai Networks.
The events of the game take place during the initial events of the manga after demons begin to merge indiscriminately. Player assumes the role of a Devilman who was accidentally created during this process.
Players navigate a hierarchical map and fight enemy NPC (who become stronger as the game progresses), as well as other playable characters in search of the final boss. Player characters can also "merge" with defeated demons, gaining their abilities and appearance. At the end of a level, results are posted on a leader-board.