Ys: Ancient Ys Vanished Omen

From Sega Retro


Ys SMSTitleScreen.png
Ys: Ancient Ys Vanished Omen
System(s): Sega Master System
Publisher: Sega
Original system(s): JP Home Computers
Publisher(s) of original games: Falcom
Developer(s) of original games: Falcom
Peripherals supported: FM Sound Unit (JP only)
Genre: RPG

Number of players: 1
Release Date RRP Code
Sega Master System
¥5,800 G-1370
Sega Master System
$59.99[1] 7501
Sega Master System
£32.95[3] MK-7501-03
Sega Master System
?F MK-7501-03
Sega Master System
DM ? MK-7501-03
Sega Master System
?Ptas MK-7501-03
Sega Master System
R$? ?

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Ys: Ancient Ys Vanished Omen is a 1987 RPG developed by Falcom first released on the PC-88 before being ported to pretty much every platform released at the time and over the next few years. Its first port released overseas was to the Sega Master System by Sega in 1988; in the US and Europe it was sold under the name Ys: The Vanished Omens and in Japan simply as Ys (イース) (the game itself is still called Ys: Ancient Ys Vanished Omen).

It is one of the few Master System games with FM support to have the FM code completely removed in its overseas releases. Furthermore, the game takes advantage of a VDP mirroring bug that was fixed on Master System II consoles and anything based on that hardware (including the Sega Mega Drive); consequently the game will look incorrectly on these systems.

A different remake of the original Ys was later included in the 1997 compilation Falcom Classics for the Sega Saturn. Despite the fact that the original Ys was the first installment of a two-part story, its sequel (Ys II: Ancient Ys Vanished - The Final Chapter) was never ported to the Master System, or the Sega Mega Drive for that matter, although a remake of Ys II was later included in Falcom Classics II for the Sega Saturn in 1998.

Production credits

Source: In-game credits[5]


Magazine articles

Main article: Ys: Ancient Ys Vanished Omen/Magazine articles.

Promotional material

CVG UK 090.pdf

Print advert in Computer & Video Games (UK) #90: "April 1989" (1989-03-16)
also published in:

Physical scans

Sega Retro Average 
Publication Score Source
78 [3]
92 [12]
89 [13]
88 [14]
88 [15]
92 [16]
75 [17]
90 [18]
88 [19]
89 №2, p6/7
85 [20]
80 [21]
85 [22]
Sega Master System
Based on
13 reviews

Master System, US
Ys US cover.jpg
Ys sms us manual.pdf
SegaAdventure SMS US Poster Back.jpgSegaAdventure SMS US Poster Front.jpg
Master System, EU
Ys EU cover.jpg
Ys EU cart.jpg
Master System, EU
® variant
Ys EU R cover.jpg
Master System, JP
Ys SMS JP Box Back.jpgNospine.pngYs JP cover.jpg
Ys SMS JP Cart.jpg
Master System, BR
Y'S Master System BR Tectoy.jpg

Technical information

ROM dump status

System Hash Size Build Date Source Comments
Sega Master System
CRC32 B33E2827
MD5 77D2FF054429F7970134E67800539A78
SHA-1 E73E836C353543E9F48315410B0D72278899FF59
256kB Cartridge (EU/US) 8kB backup
Sega Master System
CRC32 32759751
MD5 17364162DA3CCEE847850DD9B403765C
SHA-1 614B589080B732E17CC0D253E17216A72A268955
256kB Cartridge (JP) 8kB backup


NEC Retro has more information related to Ys: Ancient Ys Vanished Omen.

Ys games on Sega systems / developed by Sega
Sega Master System
Ys: Ancient Ys Vanished Omen (1988)
Sega Mega Drive
Ys III: Wanderers from Ys (1991)
Sega Saturn
Falcom Classics (Ys) (1997) | Falcom Classics II (Ys II) (1998) | Falcom Classics Collection (Ys / Ys II) (1999)