GOG Enhancer

Unofficial GOG.com helper: live currency conversion, price history, deal checks, personal tags and notes. No tracking or ads.

GOG Enhancer is an unofficial third-party browser extension that adds the features GOG.com does not ship with — without any analytics, ads, or remote code. ▸ Live currency conversion Converts prices to 24 currencies (ILS, EUR, GBP, PLN, USD, RUB, BRL, AUD, CAD, CHF, SEK, NOK, DKK, CZK, HUF, RON, TRY, CNY, JPY, MXN, ZAR, NZD, SGD, THB, IDR) using exchange rates fetched from frankfurter.dev (a free, public, ECB-backed rate service). Works whether GOG shows you USD, EUR, or any other locale — full cross-currency conversion via the rate matrix. ▸ Price-history tracking + sale-event markers Records a price snapshot every time you visit a game page. The game panel shows current vs. all-time-low vs. average on a sparkline with hover tooltips for each data point and dashed markers at every 30%+ price drop. A celebratory banner highlights when the current price matches the all-time low. Fully local — no server. ▸ Refund window timer Mark when you bought a game and the panel counts down GOG's 30-day money-back window for you. Optional desktop notification when 1–2 days remain (opt-in). ▸ IsThereAnyDeal compare button One click on a game page opens an IsThereAnyDeal search for the same title across Steam, Epic, Humble, and other stores. ▸ Cross-store price comparison table A small table right on the game page shows what Steam, Epic, Humble Store, Fanatical, and GreenManGaming currently charge for the same title, via the free CheapShark API — no need to open a new tab. Also adds a 0-100 "deal score" next to the existing worth-waiting verdict, and a sale-calendar prediction for GOG's next likely discount window in the tag dashboard. ▸ Personal tags & notes (with rename, merge, colors, drag-to-reorder) Add private tags and notes to any game. The dashboard lets you search, filter, assign per-tag colors, rename or merge tags, drag pills to reorder, and export or import via CSV. Notes support inline markdown (bold, italic, links, lists, code). ▸ Library year-in-review Annual stats: games tracked, biggest price drop, most-watched title, watch advantage (current vs. peak across the library), refund windows logged. All computed from your local data. ▸ "What to play tonight" + genre recommendations A one-click random pick from your Backlog, optionally narrowed to a genre. The dashboard also surfaces backlog games sharing a genre with titles you've already tagged or marked Finished/Playing — no ML, no network call, just your own local data. ▸ Encrypted backup, CSV round-trips, and a shareable read-only export "Export everything" in Advanced Options now offers a password-protected (AES-256-GCM, on-device only) backup alongside the plain JSON one. The Tags CSV export/import now round-trips play status too, not just tags and notes. The dashboard can also export the currently-filtered games as a single self-contained, script-free HTML page for sharing outside the extension. ▸ Real charts, genre distribution, and a spending tracker Expand any tracked game's card in the dashboard to see its full price chart. A genre-distribution chart shows which genres your library actually leans toward. Log a price alongside a purchase date on the game page's Refund window section and the dashboard totals your spending, with an optional monthly budget comparison. Year-in-review now also surfaces your "most patient purchase" and a multi-year trend. ▸ Weekly digest + auto-tag suggestions A new "This week" panel in the popup summarizes refund windows closing soon, price-alert hits, and wishlist drops — computed regardless of the desktop-notifications toggle, so it's useful even with notifications off. Untagged games in the tag dashboard also show a one-click suggested tag based on GOG's own genre metadata, never applied without a click. ▸ Accessibility, custom themes, and smarter filtering A high-contrast theme and an optional dyslexia-friendly font stack (no remote font downloads — just reordering locally-installed fonts). Pick your own accent colors with the new custom theme editor. Tag a game straight from its card on a listing page via a hover "+" button — no need to open it. The tag dashboard's search box gained a discoverable filter picker plus a genre: operator, and games can now carry an attached photo alongside their note. ▸ Built to keep working when the site changes Every lookup of GOG's page markup goes through one adapter that tries several strategies, so a redesign degrades gracefully instead of silently switching features off. A "Native" theme reads GOG's own colors and font so the extension's panels blend in, and "Check this page" in Advanced Options reports which lookups still work on the page you have open. ▸ Sync across devices — through a folder you choose Point the extension at a folder your own Dropbox / OneDrive / Google Drive / Syncthing already syncs. It reads and writes one file there and merges tags, notes, play status, purchases, alerts and price history from every browser, optionally encrypted with a passphrase. It can run by itself (when you open the dashboard and every 30 minutes, while the browser still remembers the folder permission) and keep dated backups there. No server of ours, no new network access — the folder is the whole transport. ▸ Search your library from the address bar Type gog, press Tab, then a game name, tag:rpg or status:backlog. ▸ Exports and small conveniences A refund-deadline calendar (.ics), a release-date calendar for the games on your wishlist, Markdown / Obsidian / CSV exports, a wishlist card and a weekly digest you can save as a PNG or a web page — all made on your device. Optional J / K / T keyboard navigation on game grids (and W / N / A on a game page), and a RAM-only system check on game pages. ▸ Nine interface languages The tag dashboard, Advanced Options, popup, first-run wizard and the extension's own text on gog.com come in English, Hebrew (right-to-left), Russian, Polish, German, French, Spanish, Simplified Chinese and Brazilian Portuguese. What you wrote yourself — tag names, notes — is never translated. ▸ See exactly what it does A privacy dashboard in Advanced Options lists every address the extension contacted and everything it keeps on your device, and a test fails the build if a permission or address ever changes without this policy saying so. If a feature stops working after a gog.com change, the popup offers a one-click report with no web addresses and no personal data. ▸ Achievements, streaks and challenges 36 local achievements in three tiers (a few hidden), a streak of days you've browsed, and three monthly challenges. The dashboard works from the keyboard too: a skip link, tags reordered with Alt + arrow keys, menus and dialogs that hold focus and announce changes to screen readers. ▸ Smarter prices and a smarter wishlist "Is this discount real?" compares the base price with GOG's own lowest-in-30-days and your history; an offer countdown, price per hour of play, the price in several currencies, a per-game sale rhythm, and a comparison chart. The wishlist gets sorting (discount, distance from the low, converted price), "near the low" / "ending soon" filters, a live total and exports. The catalog gets a tools bar: dim or hide games you own, "not interested", local sort, density, saved filters, side-by-side comparison, and optional endless scrolling (off by default). A pack's page shows what it really contains and warns when it overlaps games you already own. ▸ Learns your library as you browse — nothing is fetched The extension remembers which games gog.com itself marks "IN LIBRARY" on pages you open, plus ratings, languages and prices a game page states. That powers hide-owned, a language check, "what changed since your last visit", similar games you own, a weighted backlog roulette, a monthly goal, Wrapped / collector cards (PNG, drawn on your device), note history, and exports for Obsidian, Notion, Google Sheets and Trello. It never logs in to your account and never sends any of it anywhere. ▸ Calmer notifications and a calmer look Quiet hours and weekdays, one summary a day, price thresholds, alerts by tag, an optional season radar and a richer weekly digest. Fold, dock and reorder the game panel; calm mode, a one-click plain look, colour-vision palettes, text-size scaling and settings profiles. Optionally, notifications can also be posted to a webhook address you type yourself — the browser asks you once to allow that one origin, only notification text is sent, and nothing is requested unless you do this. ▸ Hebrew translations + RTL Optional Hebrew dictionary covering navigation, UI strings, and common patterns. Real RTL with logical-property CSS — not a flipped page. ▸ Wishlist sale alerts + quick filters Wishlist-icon badge counts items on sale. Quick filter bar offers "On sale", "Under $10/$25", "Rated 4.5+", and dynamic genre chips (RPG / Horror / Strategy / Sci-fi / Indie). Optional desktop notification when wishlist deals appear (opt-in). ▸ Theme picker + visual upgrade Neon (default), Classic GOG, CRT Green, Sunset, Light, Auto, a new High Contrast theme, and a Custom theme editor for picking your own colors. System-font monospace numerals for prices, era-aware accents (CRT scan-lines for classics, neon underglow for cyberpunk/witcher, genre-tuned hover effects for RPG/Horror/Strategy/Sci-fi/Indie titles), gold pill on "Good Old Game" markers, glassmorphism on the game-page panel with a blurred hero backdrop pulled from the page's cover art. ▸ Privacy-first No analytics, no third-party tracking, no Google Fonts, no remote code. All your tags, notes, and history stay on your device. Five outbound destinations only: exchange rates from frankfurter.dev, the public GOG mods catalog, GOG's own product API (api.gog.com — once per game page, to see what a pack contains; toggleable), GOG's own catalog API (catalog.gog.com — only if you turn on endless scrolling), and (optionally, on by default, toggleable) game-title lookups against CheapShark's keyless deals API for the price comparison table. None of these send cookies, a referrer or account information, and every request is listed in Advanced Options (Privacy & transparency) next to what the extension keeps on your device. Desktop notifications (if you enable them) use the local chrome.notifications API — nothing transmitted. The only other possible destination is a webhook address you enter yourself (off by default; the browser asks you to approve that single origin; only notification text is sent). ▸ Open source under the MIT license. Verifiable end-to-end. DISCLAIMER: This is an unofficial third-party tool. It is not affiliated with, endorsed by, or sponsored by GOG sp. z o.o. or CD Projekt S.A. The "GOG" name is used nominatively to describe the website the extension works with. Privacy policy: https://drummingbird1.github.io/GOGEnhancer/privacy.html Source code: https://github.com/DrummingBird1/GOGEnhancer