https://www.live-feeds.com/feed/enormous-12tb-steam-leak-includes-abandoned-half-life-2-episode-3-assetsContinuously updated, source-cited coverage. https://www.live-feeds.com/feed/enormous-12tb-steam-leak-includes-abandoned-half-life-2-episode-3-assetshttps://www.live-feeds.com/feed/enormous-12tb-steam-leak-includes-abandoned-half-life-2-episode-3-assets#u54502Wed, 02 Sep 2026 07:10:22 +0000A 12TB archive of Steam data from 2003 to 2013 has leaked online, exposing thousands of lost game builds and scrapped projects. The leak includes first-party Valve assets, such as unseen builds of Half-Life 2: Episode 3 and early versions of Portal 2 and CS:GO, alongside third-party prototypes for titles like Mafia 2 and GTA 3. The data reportedly originated from a Steam2 server architecture and was available for public download without hacking. Valve has not yet commented on the breach.Why it mattersThe leak provides a rare look at the internal development history of some of the most influent