Half-Life series - Friendly Fire Mechanics
9:29
Half-Life: Opposing Force - Minor Details and Miscellanea
6:22
More stuff about Half-Life 2 it took me 3500 hours to find/write down/be told by other people
9:42
Half-Life: Blue Shift - Minor Details and Miscellanea
4:45
Half-Life - Turret and Sentry Behavior
1:37
Brutal Half Life v3 easter egg
3:06
20 Year Old Half-Life: Decay Easter Egg Found!
16:21
The Half-Life: Source Bug Compendium
12:00