Official hub for PS5PCEM, an experimental PlayStation 5 emulator written in Zig. The site tracks game compatibility, publishes measured performance results, and links the latest downloads.

Built with Next.js 16 (App Router), React 19, TypeScript and Tailwind CSS v4. Every route is statically prerendered.

The site speaks the same twelve languages as the emulator's launcher, in the same order (Language / language_labels in src/launcher_common.zig):

The first eight shipped in the launcher with 0.3.0-alpha.1 and 0.3.0-alpha.4; Turkish, Japanese, Hindi and Korean ship in 0.3.6. /languages lists them with their launcher IDs.

Every page lives under a locale prefix — /ru/compatibility, /ar/games/ghost-of-yotei. An unprefixed request is redirected by src/proxy.ts, which picks the visitor's best match from Accept-Language and falls back to English, so older unprefixed links still work. Arabic gets dir="rtl" on <html>, and the layout uses logical CSS properties (ms-, ps-, start-) so it mirrors correctly.

English is served from the site root with no prefix — /compatibility, not /en/compatibility. This is load-bearing: those are the URLs the site was first indexed under, and putting a prefix on them turned every indexed page into a redirect, which cost the site its search visibility. Only the other eleven languages are prefixed.

src/proxy.ts enforces the shape:

There is deliberately no Accept-Language redirect. Sending a crawler — or anyone following a shared link — to a different URL than the one requested is what broke indexing; language is chosen with the switcher in the header.

What every page carries, built in one place by src/lib/seo.ts:

• a self-referencing canonical, unprefixed for English;
• the complete reciprocal hreflang set, all twelve languages plus x-default, using full BCP 47 tags (zh-Hans, not zh);
• an absolute <title> per page, so the layout template cannot double the brand, with a unique keyword-led title and description per page per language;
• index, follow stated explicitly, plus max-image-preview:large so the captures can appear in results;
• Open Graph and Twitter cards with a real 1920×1080 image and alt text.

JSON-LD comes from src/lib/schema.ts: WebSite and SoftwareApplication on the home page, SoftwareApplication on the download page (version, OS, licence, real download URL), ItemList of every title on the compatibility page, and TechArticle + BreadcrumbList on each title page, with the game as the article's subject. No aggregateRating anywhere — the project has no review data, and inventing one would be both dishonest and a structured-data violation.

sitemap.xml holds one entry per page per language with hreflang alternates, and takes lastmod from the content — the newest recorded run, or the release date — rather than from the build clock.

Each route exists once per locale: (9 pages + 32 technology articles + 33 title pages) × 12 languages = 888 prerendered pages.

The site does not invent claims. Its data files mirror the emulator repository's own documentation, and the test suite pins them to it:

The split is deliberate: src/data/ holds only locale-independent facts (slugs, tiers, dates, file names, image paths, hashes). All prose lives in src/i18n/:

The content is written for the site rather than copied from the repository, and is kept exactly as narrow as the source: a rendered menu is never described as a playable game, and claims the project withholds stay withheld in all twelve languages (the test suite enforces this for Ghost of Yōtei).

When the emulator publishes a new build or updates project-status.md, update the matching data file and run the tests — several assertions are written to fail on stale figures.

A run's release identifies the published version containing its reported changes. Keep null for work not yet included in any release; the site displays Development build in all twelve languages. Run dates and FPS remain those of the original measurements, which may precede publication. Title metadata, report badges and capture captions share the same labels.

The October 11, 2026 audit checked publication timestamps through the GitHub releases API and verified report commits against release tags with GitHub's compare API:

For example, the September 28 Big Helmet Heroes startup fix is included in 0.3.3, whereas its October 10 menu work postdates 0.3.4. Yōtei's October 5 cache report is included in 0.3.3: the release's UTC timestamp falls on October 5 in Minsk. Use commit inclusion to resolve such boundaries instead of assigning the preceding release by date.

npm install
npm run dev        # http://localhost:3000

npm test           # Vitest: data integrity + component and page rendering
npm run typecheck  # tsc --noEmit
npm run lint       # eslint
npm run build      # production build

npm test runs seven suites, 156 tests:

• tests/i18n.test.ts — the locale list matches the launcher's twelve languages in order; Arabic is RTL and everything else LTR; version strings are isolated on RTL pages; every BCP 47 tag is valid; every English key exists in all twelve dictionaries with the same {placeholders}; every title and history entry is translated in every language; no translated summary is still the English text; and the "not playable" wording survives in all twelve languages.
• tests/seo.test.ts — the recovery is pinned here: every originally indexed URL resolves without a redirect, /en/* returns 301 (not 307) onto the unprefixed path, Accept-Language never triggers a redirect, no canonical or sitemap URL ever contains /en, every page in every language has a canonical and a full hreflang set, titles and descriptions are unique per page per language and fit a result snippet (with a lower floor for Chinese and Japanese), and the JSON-LD serializes without nulls and claims no rating.
• tests/compatibility-data.test.ts — pins the dataset to project-status.md: the exact set of titles, which ten are confirmed completable, Ghost of Yōtei graded ingame and never playable, every measured figure in the English source prose, and every referenced capture present in public/. Also checks the history: unique ids, real slugs, ISO dates, release tags, newest-first ordering, and source links that point into the emulator repository.
• tests/release-data.test.ts — every download URL resolves to the matching release tag, both binaries carry their published SHA-256 digest, the release history is newest first, and the formatting helpers are correct.
• tests/compatibility-table.test.tsx — filtering, search, expand/collapse, alt text on every capture, and that Russian rows link to Russian detail pages.
• tests/pages.test.tsx — every page renders its data in English and in a second language, title pages list each recorded run with its build label and report link, an unknown slug calls notFound(), the home page presents both renderers with Vulkan as the default, the launcher page lists every environment variable, explains the graphics API choice and links its timeline to release notes or development commits, the languages page lists all twelve languages in launcher order with their IDs, the language switcher offers all twelve pointing at the same page, and external links open with rel="noopener".
• tests/tech.test.tsx — every technology article exists in every language with the English shape, related links point at real pages, and the index and articles render in English and Arabic.

1. Update latestRelease and prepend to releaseHistory in src/data/release.ts, with sizes and SHA-256 digests from the release's SHA256SUMS.txt.
2. Update src/data/compatibility.ts from the new project-status.md, and copy any new captures into public/images/.
3. Add an entry to src/data/history.ts for each new dated run. Set release to the first published version containing its changes, or null while they are unreleased. Revisit these entries when publishing the next release.
4. Write the prose for anything new in src/i18n/content/en.ts, then in the other eleven content files. TypeScript will not let a locale fall behind.
5. Run npm test and fix whatever the pinned assertions report.

Only if the emulator's launcher adds one. Append it to locales in src/i18n/config.ts with its native name, BCP 47 tag and direction, then add src/i18n/dictionaries/<code>.ts, src/i18n/content/<code>.ts and src/i18n/tech/<code>.ts and register them in src/i18n/index.ts. Add its launcher ID and first release to launcherLanguages in src/data/launcher.ts. The routes, sitemap and hreflang alternates follow automatically.

The site is not affiliated with or endorsed by Sony Interactive Entertainment. No games, console firmware, system libraries or keys are distributed here. The emulator itself is licensed under the GNU GPL, version 3 or later.