Enemy Zero is one of the horror titles by Warp, closely connected to D (and its sequel D2 for Dreamcast). It also features the same heroine as in D series.
The crew members of the spaceship Aki were in a state of suspended animation. All of a sudden, the ship emergency program woke them up. What has happened? Apparently, a hostile alien life form had penetrated the spaceship. Now Laura, the heroine of the game, has to establish contact with her comrades, finding her way through the maze-like corridors of the giant vessel. She will also have to defend herself against the aliens, which seem even more intimidating because they are totally invisible.
The game consists of two genres: puzzle-solving adventure and shooter. When you enter a room, the enemies can't attack you, and you can explore it from 1st person perspective, taking objects, and solving puzzles. When you wander through ship corridors, you enter the 1st person shooter mode. Since the enemies are invisible, you'll have to listen to the sounds they make. A high sound means an enemy is right in front of you; a mid-range sound means it is attacking from the side; a low-pitched noise tells you it is behind you. You can figure out the distance between you and the enemy by the intensity of the sound.
The game was originally envisioned for the PlayStation, but it was eventually moved to the Saturn.
The game music was done by the minimalist English composer Michael Nyman. The songs were recorded at the Abbey Road studio, known for The Beatles.
There was an edition of the Saturn version limited to 20 copies that cost about 2,000 per piece. Although nothing was different about the release itself, it was hand-delivered by Kenji Eno at your home.
Jill Cunniff, singer/songwriter/bassist for the band Luscious Jackson provided the voice for Laura in the English versions. Since Laura remains mute throughout the game itself (as in D) you will only hear Jill's contributions in the brief "story so far" summary when loading your game from the voice recorder.