Dreamcast life-sim Mercurius Pretty now has an English patch

ROM hacker Shock8 has released version 0.1 of an English translation patch for Mercurius Pretty: End of the Century on the Sega Dreamcast. Available for free through ROMhacking.net as of October 14, 2026, the patch translates the Japan-exclusive life-simulation game into English for the first time since its launch 26 years ago.

Published in Japan by NEC Interchannel on November 16, 2000, the Dreamcast release is a full, voiced remake of NEC and Headlock's 1994 PC-98 computer game Mercurius Pretty. The original computer version received a Windows port in 1996 and inspired NEC's 1999 PlayStation simulation game Pixygarden, though none of those entries ever received an official Western localization. Because the genre relies so heavily on reading comprehension and daily menus, the series has remained largely unplayable for anyone without a strong grasp of Japanese.

Raising a homunculus in 48 days

The premise casts the player as an apprentice to the 16th-century alchemist Paracelsus. Your job is to raise an artificially created homunculus inside a glass flask over a 48-day cycle. You manage the tiny fairy's daily schedule, balancing education, exercise, reading, health, and conversation to shape how she develops before reaching maturity.

It follows the same stat-raising blueprint popularized by Gainax's Princess Maker series on the PC-98, trading royal court politics for 16th-century alchemy. NEC Interchannel built a whole business out of porting and publishing text-heavy simulations and visual novels like Sentimental Graffiti and Black/Matrix across the Sega Saturn, PlayStation, and Dreamcast during the late 1990s. Most of that catalog stayed in Japan when the Dreamcast was discontinued in 2001.

17,000 lines and a strict disc check

Shock8's release is labeled as an AI-assisted machine translation that covers more than 17,000 lines of Japanese script alongside translated user interface graphics. Machine-translated patches don't always nail the nuance of conversational Japanese, and I'm curious how well the alchemical terminology holds up across 17,000 lines of dialogue. Still, for an obscure stat-raising game with a script of that size, waiting around for a traditional multi-year manual translation team probably meant waiting forever.

Shock8 is also planning to release a web-based GUI toolkit so other volunteers can refine and hand-edit the translated dialogue in future updates. Turning a rough machine pass into an open community editing project is a smart way to handle a script that would otherwise bury a solo hacker.

If you plan to test the patch on original Dreamcast hardware via an optical drive emulator or through an emulator like Flycast, pay close attention to your disc image. The patch works with disc revision 1.003 only, and applying it to a different dump won't work.