Overview
Fortified Zone, the first game in the Ikari no Yousai franchise, was released February 26, 1991 by Jaleco. The game is a top-down shooter, similar to the more action oriented portions of the original Metal Gear. Fortified Zone later had a Japan only sequel for the Game Boy, titled Ikari no Yousai 2, and a Super Nintendo Entertainment System sequel titled Operation Logic Bomb.The game stars two elite commandos: Masoto Kanzaki (the male commando) and Mizuki Makimura (the female commando). Their goal is to infiltrate a jungle base.
Gameplay

At four stages in length (titled, in order, Field, Jungle, Caves, and Complex), Fortified Zone is a relatively short game. The goal in each stage is to reach the boss, by reaching a particular set of stairs leading to the respective boss room. The boss is in an isolated room each time, and upon defeating him the player moves onto the next level.