Fire Emblem: Shin Monshō no Nazo: Hikari to Kage no Eiyū

Fire Emblem: New Mystery of the Emblem
Cover art for New Mystery of the Emblem, featuring Marth (left) and the default male Avatar (right).
Developer(s)	Intelligent Systems
Publisher(s)	Nintendo
Director(s)	Kouhei Maeda Hedaki Araki
Producer(s)	Toru Narihiro
Artist(s)	Daisuke Izuka
Writer(s)	Kouhei Maeda
Composer(s)	Hiroshi Morishita Takeshi Kanezaki Sei Murakami
Series	Fire Emblem
Platform(s)	Nintendo DS
Release date(s)	JP: July 15, 2010
Genre(s)	Tactical role-playing
Mode(s)	Single player, multiplayer

Fire Emblem: New Mystery of the Emblem: Heroes of Light and Shadow is a tactical role-playing game developed by Intelligent Systems and published by Nintendo for the Nintendo DS handheld video game console in July 2010. It is a remake of the Super Famicom title Fire Emblem: Mystery of the Emblem, the third entry in the Fire Emblem series. The story is based on the original content from Mystery of the Emblem, while including a customizable Avatar as the main character alongside Marth, the protagonist of Shadow Dragon and the Blade of Light. New Mystery of the Emblem also adapts the story content from the Satellaview title BS Fire Emblem into four additional story episodes dubbed the "New Archanea Chronicles".

Preparations for New Mystery of the Emblem began during development of the 2008 DS remake of Shadow Dragon at the Blade of Light. Instead of building on Shadow Dragon for New Mystery of the Emblem, the staff started over and used the original Mystery of the Emblem as their starting point. Staff included producer Tohru Narihiro, co-director and writer Kouhei Maeda, co-director Masayuki Horikawa, and character designer Daisuke Izuka. Two of the major new elements were the customizable Avatar character and the "Casual Mode", in which units defeated in missions are revived: the latter element was a point of fierce contention between staff due to the series' long-standing tradition of permanent death for characters. It was the first Fire Emblem to remain exclusive to Japan since Fire Emblem: The Binding Blade in 2002. Upon release, it received critical acclaim from Japanese and Western journalists, and went on to sell over 274,000 units.