As part of its 20th Anniversary celebration, Half Life 2 got Developer Commentary from the original developers. Here are all the audio clips from the second chapter, Red Letter Day.
0:00 - Marc Laidlaw - Kleiner's Lab
1:13 - Bill Fletcher - Choreography
1:59 - Yahn Bernier - Face Poser
2:57 - Yahn Bernier - Choreo Commands
3:56 - Dhabih Eng - Lab Interactivity
4:51 - Ken Birdwell - Delivery
5:49 - Marc Laidlaw - Writing
6:50 - Ariel Diaz - Character Reactions
7:27 - Miles Estes - Animation
8:20 - Bill Van Buren - Tone
9:06 - Bill Van Buren - Archetypes
10:00 - Bill Van Buren - Voice Actors
11:34 - Ido Magal - Monitors
12:15 - Ken Birdwell - Alyx's Kiss
12:43 - Jeff Lane - Theme Interactivity
13:24 - Bill Fletcher - Phoneme Extraction
14:07 - Matt Wright - Weaponless
14:45 - Kelly Bailey - Dynamic Mixing
15:43 - Kelly Bailey - Bullet Audio
16:32 - Yahn Bernier - Audio Caching
17:36 - Jay Stelly - Physics Sound
19:05 - Kelly Bailey - Automating DSP