Valve has confirmed to IGN that it will not be announcing any new projects at this year’s E3.
Previously, a great deal of speculation has surrounded the announcement of Half-Life 3, among other projects. The Half-Life franchise was last seen in 2007 with the release of Half-Life 2: Episode Two in The Orange Box.
At the moment, Valve is working on Dota 2 and Counter-Strike: Global Offensive, both of which are currently in closed beta. In addition, new Portal 2 DLC is set to arrive in the coming weeks.
Source: IGN UK