NostalgiaDB vs YGOPRODeck

NostalgiaDB is a free metadata database for retro game releases spanning 1977–2005. Its archive covers titles, platforms, release dates, ratings, cover art, and descriptions across 45 gaming platforms. Natural-language search helps locate games, while a GraphQL API provides access to releases, ROMs, systems, reviews, and media; API queries require a key and are limited to six levels of depth. Free SQLite database archives can be downloaded with a free registered account, and their presigned URLs remain valid for 15 minutes. Registered members can use the browser-based Play portal to run their own locally stored ROM files in a client-side emulator sandbox. Play requires a Chromium-based browser such as Chrome, Edge, Brave, or Opera. The portal says game files are read from the user’s device and are not uploaded or transmitted to Nostalgia Lab servers. Centralized sign-in supports Google, Microsoft, and Discord. Nostalgia Lab describes the platform as a non-profit preservation project funded by voluntary donations and serving researchers, historians, developers, and enthusiasts. It says it does not sell user data, serve targeted ads, or store payment information.

YGOPRODeck is a Yu-Gi-Oh! TCG community site with a card database, deck tools, and a public API. The database supports advanced searches using fields, ranges, and boolean operators. Its deck tool lets users edit and share decks and view prices; submitting a created deck requires a login. Tournament and meta decks are organized by categories including format and archetype. The site also lists a card pack simulator, cube drafting, a Master Duel arena, forums, and tournament breakdowns. The free API returns card, card-set, archetype, random-card, and database-version data as JSON, and supports TCG, OCG, Speed Duel, Rush Duel, and GOAT. It allows 20 requests per second; exceeding that rate blocks access for one hour. The API guide asks users to download and store retrieved data locally to limit requests, and warns that not doing so may lead to IP blacklisting or API rollback. YGOPRODeck is freemium, with paid plans from €4.99/mo, and is available on the web and through its API. The privacy policy describes CCPA and GDPR data rights and says requests receive a response within one month.