Thirteen terabytes of data from Steam’s repository, reportedly spanning from 2003 to 2013, have been leaked online in the past 24 hours. The leak was made public via a torrent file, and those investigating the content reported that it contains beta versions of thousands of games, including Portal 2, Left 4 Dead 2, Dragon Age: Origins, and Batman: Arkham Asylum. It has currently not been confirmed exactly who obtained the leaked data in question, but the leak appears to be very real and can be easily found online. Given the size of the leak, it’s taken a while for people to sort through it all, but a list of the content discovered so far is actively being cataloged on GitHub. It’s important to note that the “Steam2” leak, as it’s been dubbed, contains data spanning from 2003 to 2013. Considering how much video game file sizes have skyrocketed in the last decade, 13 terabytes of data from before 2014 is a lot more than some might initially assume. (1/2) That Valve leak that happened a few hours ago might actually be one of the biggest video game leaks of all time. It will be interesting to see how this all happens. Basically, a bunch of beta versions uploaded to Steam between 2003 and 2013 have been leaked. — AestheticGamer aka Dusk Golem (@AestheticGamer1) August 30, 2026 With this in mind, there is a lot of unconfirmed information floating around out there right now. This is essentially my way of warning you that you should take any supposed Half-Life 3 “leaks” with an extra carton of salt over the next week or two. However, there are a couple of interesting things that have already been confirmed, such as the existence of a Portal 2 beta. Someone leaked 12 TB of Valve’s internal builds and game assets from 2003 to 2013. This includes early versions of Portal 2, Left 4 Dead, CS:GO, F-Stop, and potentially EP3. The community is still investigating everything, so the next few days could be crazy… There’s a Weaponizer… pic.twitter.com/Sg7OqJjL2X — Gabe Follower (@gabefollower) August 29, 2026 Some videos of people playing the game have started to appear online, which is probably why Elan Ruskin, a former Valve developer who worked on games like Half-Life 2: Episode Two, Left 4 Dead 2, Portal and Portal 2, chose to address the existence of the “pre-release” versions of Portal 2 and Left 4 Dead 2 in a post on X today. My condolences to anyone who wastes their time playing pre-release versions of P2 or L4D2. Listen, every good idea we had was included in the final thing we shipped, and anything that wasn’t in the final version wasn’t a good idea. https://t.co/S4mTllUy3F — Elan Ruskin (@despair) August 30, 2026 According to Gabe Follower at In this context, an “endpoint” is slang for a URL to which users can send requests and receive responses. From what I understand, endpoints are usually publicly available anyway, but require a form of authorization to access. With that in mind, if Gabe Follower’s sources are correct, I’m curious if this means the leak data has something to do with SteamOS launching in 2013. According to Gabe Follower, the fact that the “Steam2” repository data only goes back to 2013 may have something to do with Valve’s move “to the new storage system” in 2013. For context, Steam launched on September 12, 2013. 2003 and SteamOS 1.0 was released in December 2013, which coincides with the start and end dates of the Steam2 repository leak contents.
