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Fortified Zone

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Title Screen

Fortified Zone

Also known as: Ikari no Yousai (JP)
Developer: Jaleco
Publisher: Jaleco
Platform: Game Boy
Released in JP: February 26, 1991
Released in US: September 1991
Released in EU: 1991
Released in AU: July 7, 2011 (3DS Virtual Console)


RegionIcon.png This game has regional differences.


So very stubbly.
This page is rather stubbly and could use some expansion.
Are you a bad enough dude to rescue this article?

The first game in the Ikari no Yōsai series.

Leftover Passwords

YURI KEI! AMI! RIE!
MOMO EMI! MAI! YUU!
MINT ELI! REI! SAKI
YOKO RISA KAYO RUMI
MAMI JUN! TAE! NAMI
MIA! GAMI RIKA ERI!

A set of special passwords that were only usable in the Japanese version, stored at 13C90.

In the US version, these passwords are all that remain of what the Japanese version used, which included three more sets: The game's normal passwords, and the ones that give infinite energy for each of the two characters. Any of these above passwords, if used in the Japanese version, will give Mizuki 'SD' style graphics and change the regular shots into hearts. Attempting to use these passwords in the US version by manipulating the values via patch codes will simply return invalid.

Whereas each column starts the player on a different stage, the first row is for normal play, but the others will give infinite energy and weapon power, as well as affect who the starting character is and start Masato off with the flame thrower.

Regional Differences

Title Screen

Japan US/EU
IkariNoYousai GB-Title.png Gbfortzone-title.png

Menu

Japan US/EU
What's da password? ENTER ID CODE.

The 'Password' option was changed to 'I.D. Code' for the US/EU release.

Password Screen

Japan US/EU
Oh so many! Does the US hate its own alphabet...?

The password screen in the Japanese version includes all letters of the alphabet. The US/EU switches them out for the feeble numbers 1-8.

Program Player

Japan US/EU
Ikari no yousay gb spprogram.png Fortified zone gb spprogram.png

The typo in the Japanese version menu was fixed in the US/EU version.

"Walk through walls" Glitch

Japan US/EU
Ikari no Yousai skip.png Fortified Zone skip.png

Even though the Japanese version was released before the US and European versions, there is a glitch in the latter versions that allows you to walk through 8 pixel wide walls. This glitch does not work in the Japanese version.