Half-Life series
- The games
- Half-Life (series)
- Half-Life (video game)
- Half-Life: Opposing Force
- Half-Life: Blue Shift
- Half-Life: Decay
- Half-Life 2
- Half-Life 2: Episode One
- Half-Life 2: Episode Two
- Half-Life 2: Episode Three
- Half-Life 2: Lost Coast
- Half-Life 2: Survivor
- Codename: Gordon
- Portal (video game)
- The Orange Box
- Characters and creatures
- Gordon Freeman
- Adrian Shephard
- Barney Calhoun
- G-Man (Half-Life)
- Wallace Breen
- Alyx Vance
- Isaac Kleiner
- Eli Vance
- Judith Mossman
- Dog (Half-Life)
- Father Grigori
- Odessa Cubbage
- Arne Magnusson
- Doctor Rosenberg
- Combine (Half-Life)
- Headcrab
- Vortigaunt
- Creatures in the Half-Life series
- Other
- Gravity gun
- Locations of Half-Life
- Half-Life 2: Raising the Bar
- Concerned
- Half-Life: Escape from City-17