Half-Life 2's cancelled Episode 3 surfaces after nearly 20 years, reopening old wounds

Old Half-Life 3 wounds have been reopened after new details of the cancelled Half-Life 2: Episode Three have reportedly leaked, nearly 20 years later. To this day, fans of Valve's legendary series are still waiting for a sequel that seemingly may never officially arrive.

Released in 2007 for PC, PS3 and Xbox 360, Half-Life 2: Episode Two was included in The Orange Box, alongside Half-Life 2, Episode One, Portal and Team Fortress 2. It was a fantastic addition to the series, but it ended on a devastating cliffhanger that fans hoped would lead into Episode Three and eventually Half-Life 3.

Sadly, neither Episode Three nor Half-Life 3 has arrived, leaving fans with some seriously unresolved Gordon Freeman and Alyx Vance issues. Fans would love official answers, but these latest leaks are another reminder of what could have been.

Half-Life 2: Episode 3 resurfaces in major new Valve leak

As brought to our attention by Reddit user Eepoxi, development files reportedly belonging to Half-Life 2: Episode Three have surfaced online, alongside previously unreleased Portal 2 beta maps and other Valve material.

The discoveries also follow earlier leaks involving F-Stop, Valve's cancelled Portal concept that featured a mechanic allowing players to photograph objects and place them elsewhere, sometimes at different sizes.

Unfortunately, the original Imgur gallery appears to be unavailable, although images from the leak have been uploaded to another host, for now. There's currently no evidence that Valve was responsible for the gallery becoming inaccessible.

This isn't the first time that secret Valve projects have been leaked, either. Back in August 2026, a massive 12TB leak reportedly revealed previously unseen Half-Life and Portal content, including development material dating back to between 2003 and 2013.

How are Half-Life fans reacting to the latest leaks?

“Everyone's hyping up for game awards again? Just to get effed by some generic Multiplayer Game that delays after a couple of weeks,” said gerd_grimmen, with Totheendofsin adding, “It's like a yearly tradition at this point.”

“Now if that person had been bold enough to leak more EP3 content, assets or even some stuff from the early Source 2 era like the actual first iteration of Half-Life 3 or Left 4 Dead 3, then... yikes, but at that point Valve would unleash Saxon Hale to deal with that person,” suggested maZZtar.

“We knew this was likely coming for a while because of the F-Stop assets leak, but man, this is gonna be big if we get it all,” said Mal0-Official.

READ MORE: Half-Life 3 release date rumours, HLX leaks and everything Valve has said

Whether Valve will ever treat us to Half-Life 3 remains to be seen. Personally, I can't see Episode Three ever being released as a standalone game. Perhaps its unfinished story could be incorporated into Half-Life 3, if that long-awaited sequel ever happens.

However, more than 20 years have passed since the original release of Half-Life 2, and these continued leaks serve as a bittersweet reminder of what could have been. Come on, Valve, surely we've all waited long enough? Make it happen, please.