--- title: Report: 13TB of Steam data from 2003-2013 leaked to public description: A reported breach dubbed the "Steam2 leak" has exposed roughly 13TB of data uploaded to Valve's old Steam server infrastructure between 2003 and 2013, before... canonical: https://daily.dev/posts/report-13tb-of-steam-data-from-2003-2013-leaked-to-public-dvhwnehvt twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Report: 13TB of Steam data from 2003-2013 leaked to public | daily.dev og:description: A reported breach dubbed the "Steam2 leak" has exposed roughly 13TB of data uploaded to Valve's old Steam server infrastructure between 2003 and 2013, before... og:url: https://daily.dev/posts/report-13tb-of-steam-data-from-2003-2013-leaked-to-public-dvhwnehvt og:image: https://api.daily.dev/og/posts/dvHwNeHVt.png og:image:alt: Report: 13TB of Steam data from 2003-2013 leaked to public og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Report: 13TB of Steam data from 2003-2013 leaked to public **[Game Developer](https://daily.dev/sources/gamedeveloper)** · 2 min read · 0 upvotes · 0 comments ## Summary A reported breach dubbed the "Steam2 leak" has exposed roughly 13TB of data uploaded to Valve's old Steam server infrastructure between 2003 and 2013, before it was replaced by SteamPipe in 2013. The dump reportedly includes early builds and screenshots of Valve titles like Left 4 Dead 2, Portal 2, and the unreleased Half-Life 2: Episode 3, plus beta builds of third-party games such as Dragon Age: Origins and Batman: Arkham Asylum. An X user claims no hacking was involved, saying the data was accessible via a publicly exposed endpoint, and sources suggest the exposure may stem from third-party servers rather than Valve directly. Valve has not yet commented, and the scope of sensitive third-party data exposed remains unclear. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### What is the Steam2 leak and what data was exposed? The Steam2 leak refers to a reported exposure of about 13TB of data from Valve's old Steam server infrastructure, uploaded between 2003 and 2013, before it was replaced by the modern SteamPipe system in 2013. It reportedly includes early builds and screenshots of Valve games like Left 4 Dead 2, Portal 2, and the unreleased Half-Life 2: Episode 3, plus third-party titles such as Dragon Age: Origins and Batman: Arkham Asylum. _Developers tracking platform security incidents can follow breach reports like this on daily.dev._ ### Was the Steam2 leak caused by hacking? An X user who shared screenshots of the leaked data claimed no hacking was involved, stating the material was accessible via a publicly accessible endpoint rather than obtained through an intrusion. Sources suggest the exposure may not have originated from Valve's own systems, but from third-party servers that had previously hosted data gathered during earlier leaks. _Security-minded developers weighing third-party exposure risk can track incidents like this on daily.dev._ ## Similar posts on daily.dev - [Steam achievements for unreleased and unannounced games leak on aggregators such as Exophase and SteamDB](https://daily.dev/posts/steam-achievements-for-unreleased-and-unannounced-games-leak-on-aggregators-such-as-exophase-and-ste-qj3jrydkk) · GamesIndustry.biz · 0 upvotes · 0 comments --- Tags: [#gaming](https://daily.dev/tags/gaming), [#data-breach](https://daily.dev/tags/data-breach), [#steam](https://daily.dev/tags/steam), [#data-leak](https://daily.dev/tags/data-leak) [View this post on daily.dev](https://daily.dev/posts/report-13tb-of-steam-data-from-2003-2013-leaked-to-public-dvhwnehvt) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Report: 13TB of Steam data from 2003-2013 leaked to public","url":"https://daily.dev/posts/report-13tb-of-steam-data-from-2003-2013-leaked-to-public-dvhwnehvt","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/report-13tb-of-steam-data-from-2003-2013-leaked-to-public-dvhwnehvt"},"datePublished":"2026-08-31T17:29:56.463Z","dateModified":"2026-08-31T17:57:18.830Z","description":"A reported breach dubbed the \"Steam2 leak\" has exposed roughly 13TB of data uploaded to Valve's old Steam server infrastructure between 2003 and 2013, before...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/d639e9d1da3811a54d46bacdb405267a?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/d639e9d1da3811a54d46bacdb405267a?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Game Developer","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Game Developer","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/5fbb7418db8746769a45f55309bbdf13","url":"https://daily.dev/sources/gamedeveloper"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/report-13tb-of-steam-data-from-2003-2013-leaked-to-public-dvhwnehvt","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"gaming,data-breach,steam,data-leak","timeRequired":"PT2M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Game Developer","item":"https://daily.dev/sources/gamedeveloper"},{"@type":"ListItem","position":3,"name":"Report: 13TB of Steam data from 2003-2013 leaked to public"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/report-13tb-of-steam-data-from-2003-2013-leaked-to-public-dvhwnehvt#faq","mainEntity":[{"@type":"Question","name":"What is the Steam2 leak and what data was exposed?","acceptedAnswer":{"@type":"Answer","text":"The Steam2 leak refers to a reported exposure of about 13TB of data from Valve's old Steam server infrastructure, uploaded between 2003 and 2013, before it was replaced by the modern SteamPipe system in 2013. 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