The sniper's voice actor (TF2) said that Valve was not actively working on HL3, due to technology barriers. Basically, Valve wants to use motion capture technology, to get life like character interactions, but this is very hard to combine with characters that have to constantly look at you, even when doing complex facial animations, like they did in HL2.
This is not directly from Valve obviously, the VAs probably aren't in on game development, but he voices a few characters in the HL series. That said, it could also be a diversion, and he's just trolling.
This is not directly from Valve obviously, the VAs probably aren't in on game development, but he voices a few characters in the HL series. That said, it could also be a diversion, and he's just trolling.