ReC98

ReC98 is a preservation-focused reverse-engineering effort targeting the five PC-98 Touhou games, from TH01 through TH05. Rather than offering playable builds, it reconstructs the original binaries into readable, purpose-annotated code and, where possible, C++ source. The site serves as the project’s public dashboard, showing how far each executable has been reconstructed.

The core of the site is its completion status tables. Progress is reported per game and per executable, such as OP.EXE, MAIN.EXE, and MAINE.EXE, with separate figures for reverse-engineered code and finalized code. The gap between the two is explicitly labeled technical debt, and additional metrics cover position independence, giving a candid view of remaining work.

Supporting pages include an archived FAQ, a crowdfunding log, a progress blog, per-commit metrics, and links to the ReC98 and website repositories. A Fediverse presence keeps followers updated. Together these give contributors and observers a transparent record of methodology and day-to-day output.

This material is aimed at reverse engineers, decompilation enthusiasts, game-preservation researchers, and Touhou fans curious about the internals of the PC-98 era. Readers should treat the percentages as work-in-progress indicators rather than finished releases, and consult the blog and repository for context on what each metric means.

In short, ReC98 is a transparent, ongoing engineering archive rather than a game download site, best appreciated