It will be released in 2013.
I've compiled a list to show you how i figured it out.
Half-Life 1998
Half-Life 2 2004
HL2: EP1 2006
HL2: EP2 2007
As You Can See, every 6 years Half-Life Series Get released.
Now, to tell you why EP1 & 2 are made in 3 years.. because their chapters are LOW.
So, from 2007, add +6 years, 2013. let's wait there and see for our selves.
Damn it i cant wait for it to get released.
EDIT: I heard that the HL2 voice producer died in 2007. so maybe we won't have.. Ep3.
![](img/smiles/sad.gif)