Gabe Newell Reveals Deaf Character in Half-Life 2's History -
Athree part YouTube interview has popped up in which Newell explainsthis backstory to a group of focus testers. As you may be able to tell,many of the participants are hearing impaired.
Unfortunately, the author of the video has disabled embedding from YouTube. However, the reveal by Newell can be found in part two of three. The rest of the interview can be found here by way of part one and then part three.
Pretty interesting to see how Valve are trying to cater for deaf gamers.