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Devil Summoner: Soul Hackers: Extra Dungeon is a 1998 role-playing video game for the Sega Saturn, and a spin-off of Devil Summoner: Soul Hackers in the Devil Summoner series. It was developed and published by Atlus, releasing as a lottery prize of 1000 copies through the New Years Campaign which ended on January 31st, 1998. Entries were submitted by mailing in the registration included in copies of Devil Summoner: Soul Hackers: Akuma Zensho Dainishū for the Sega Saturn.[1]
↑"" Translation: "Akuma Zensho Volume 2 New Years Campaign Information: Thank you for purchasing our product. If you fill out this registration postcard and send it to us, you will be entered into a lottery where 1,000 people will be able to play EXTRA Dungeon using save-data from the main game. (Devil Summoner: Soul Hackers). We will give you a CD-ROM as a gift. The deadline for applications is Saturday, January 31st, 1998." Devil Summoner: Soul Hackers: Akuma Zensho Dainishū Registration Card (Sega Saturn). Developed by Atlus. Published by Atlus. Japanese.