According to the Internet and frequent cycle of rumors Valve is well into the development of Half-Life 3 on their new Source engine. However according to Half-Life 2 voice actor John Patrick Lowrie, the game is not even currently in development.
The reason he states is due to limited motion-capture technology.
“As far as I know they are not developing HL3 now for several reasons, among them the mo-cap issue,” Lowrie explained in a comment on his blog. “What they might decide in the future depends on lots of different factors. I hope they do, personally, but it has to make sense for them.”
The blog post goes on to explain how Valve considers it important for the in-game characters to feature realistic expressions and reactions; something which is hard to get with today’s mo-cap technology.
“One of the great things about HL2 is that all of the characters that you meet actually look at you when they talk to you no matter where you go or stand. With mo-cap you can’t do that, at least not yet. Once you film the actor doing something and capture that motion, that’s what the character is going to do. This works great in movies, but when you make something interactive it gets way less interactive with mo-cap. So that’s one of the things they’re working on.”
“When Gabe said ‘we’re not talking about HL3′ he was right. The company is not considering it at this time as far as I know. One of the reasons is the mo-cap thing, but there are others as well. I was just trying to give you a little insight on the decision making process.”
Recently it’s widely suggested that Valve is all set to reveal a new Left 4 Dead title.