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A quick history of Source 2, the possibly released engine that may power Half-Life 3

It appeared as if Valve had soft-launched the Source 2 engine in a recent update to the massively popular Dota 2, but the company has yet to confirm if the game is running on the new engine, or is simply benefiting from the work being done on the new engine, or if we're just grasping at straws.

"Everything in this package is a new game," wrote RoyAwesome on the Dota 2 subReddit, a user who has been collecting evidence so far. "It's all the Dota assets and code ported over to Source 2. That's why Hammer is different. That's why the console is different."

"The general consensus around the Source reverse engineering community is that this is really Source 2."

Would Valve just kind of release a new engine in a huge game in this manner, without telling anyone? It's possible, and the company certainly has strange ways of getting news out. This video is a quick, five-minute look at the history of Source 2 engine leaks, hints and teasers, including information given out when people just kind of showed up at the Valve office.

The video contains information about Half-Life 3, Left 4 Dead 3, and the Source 2 engine itself, collecting all the tiny hints and various leaks that have taken place in the past few years.

It's interesting to see everything collected in one place, and it does a good job of explaining where the data came from and raises the question of whether we'll get any sort of official announcement about the technology, or any of these sequels, at Gamescom.

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