Enemy Zero on Sega Saturn: Kenji Eno’s Invisible-Alien Horror on Four Discs, and How to Tell T-30001G From the Rest

Enemy Zero is the Saturn horror game in which you cannot see the monsters. Kenji Eno’s studio Warp released it in Japan on 13 December 1996 on four discs, with music by Michael Nyman, and the aliens that hunt you through a spaceship are invisible: you find them by sound alone.

It was also released in North America and Europe and later on Windows, so there are several copies with the same name. This guide is about the Japanese Saturn release, how to tell it from the others, and how to search for it.

• The disc set: エネミー・ゼロ, Sega Saturn, Warp, 13 December 1996, 6,800円 before tax, four discs
• Product code: T-30001G; barcode 4974365091323
• Budget reissue: サタコレ edition, 11 December 1997, T-30004G, barcode 4533992000025, 2,800円 before tax — also four discs, with an easier mode added
• Other versions: Saturn in North America (November 1997, published by Sega) and Europe (December 1997); Windows 95/98 in 1998
• Region: the Saturn is region-locked, so a Japanese disc needs a Japanese console or a converter cartridge
• Buying it: search エネミー・ゼロ セガサターン on Buyee, or Enemy Zero saturn NTSC-J on eBay

What is Enemy Zero?

It is a mix of two kinds of game. Japanese Wikipedia describes adventure sections built from pre-rendered movies and stills, where you explore crew rooms and solve puzzles, and action sections in which you walk the corridors in first person. The enemies in those sections are invisible. A device called the VPS tells you where they are with tones: the closer the alien, the faster the beeps, and the pitch changes as it moves from in front of you to behind you.

It is not forgiving. Your energy gun has to charge before it fires and has a range of only a few metres, every enemy attack kills you, and saving and loading both use up a voice recorder’s battery. Japanese Wikipedia says the difficulty was meant to push players into playing late at night.

The game also has a story behind it. It was first announced for the PlayStation; at a PlayStation event on 27 March 1996, Eno announced it was moving to the Saturn. The heroine, Laura, is the same “digital actress” who starred in Warp’s earlier D. Japanese Wikipedia gives Saturn sales of 272,000 copies and about 600,000 including the PC version.

How do you tell the Japanese release from the others?

Start with the codes. The Japanese first release is T-30001G, listed in Sega’s own licensee software list, and its barcode is 4974365091323. The budget reissue in the サタコレ line is T-30004G with the barcode 4533992000025; shops add サタコレシリーズ to its name. The Media Arts Database records both as four discs.

The two Japanese editions differ in one way that matters. Japanese Wikipedia says the reissue added a mode with unlimited saving and loading and a lower difficulty — a mode first included in the Western versions and brought back to Japan in the budget edition.

The Western Saturn versions came out in North America in November 1997, published there by Sega rather than Warp, and in Europe in December. The Windows version is a different product altogether: a PC CD-ROM for Windows 95 and 98, released in 1998. Hardcore Gaming 101 calls it the version to regard as definitive, since it runs at a higher resolution with improved textures.

One thing a Japanese disc will not do is run on a Western Saturn. As Sega Retro puts it, the Saturn “is region-locked, meaning that games can only be played on hardware from the same region”; the usual answer is a converter cartridge.

Can you play it without reading Japanese?

Partly, and it depends on which part of the game you are in. The Japanese release is voiced in Japanese: English Wikipedia notes that Laura is voiced by Yui Komazuka in the Japanese version, and Japanese Wikipedia lists a Japanese voice cast for the crew. The adventure sections, with their puzzles and the crew members who guide you, depend on what those characters say.

The action sections lean far less on words. The VPS works with tones alone — Hardcore Gaming 101 describes a high-pitched beep for an enemy in front, a lower one for the sides and behind, and beeps that speed up as it gets closer, and notes that a tutorial explains the system. Western magazines played the Japanese disc before the English release: GameFan named it its “Best Import Game of the Year” for 1996, and Mean Machines reviewed the Japanese version nearly a year before the European release.

If you want it in English, the Western releases are the English versions: English Wikipedia says Laura is voiced there by Jill Cunniff of Luscious Jackson.

Was there a sequel?

Not as Enemy Zero: none of the sources below lists an Enemy Zero 2. Japanese Wikipedia instead places it as the second part of a “Laura trilogy” that began with D, in which the same character, Laura, is reused in a different role in each game.

Where can you buy it today?

On 14 October 2026 we counted 76 listings of the game among the first 100 results on Buyee.

Enemy Zero · エネミー・ゼロ · Sega Saturn, 13 December 1996 (T-30001G) · Warp

Where to buy: Suruga-ya.jp — title (エネミー・ゼロ) · Buyee — title (エネミー・ゼロ セガサターン) · eBay — Enemy Zero saturn NTSC-J

Search Kataban: Enemy Zero → · エネミー・ゼロ → · T-30001G →

Holding a boxed copy? Scan the barcode on the back of the case with Kataban’s scanner, and it finds the edition you have.

Why search Kataban for this one?

Because the two Japanese editions share a name. Enemy Zero, エネミー・ゼロ and エネミーゼロ each return both Saturn entries, with their codes, so you can tell the 1996 release from the budget reissue before you buy. T-30001G and T-30004G each return one, and so does each barcode.

A horror game about something you cannot see, sold on four discs, in a box with a code on the spine: the code is the easiest part of it to find.