Half-Life 2: 20th Anniversary Documentary
- Jaar: 2024
- Land: United States of America
- Genre: Documentaire, Historisch
- Studio: Secret Tape, Valve
- Trefwoord: video game, behind the scenes, steam, half-life, valve
- Regisseur: Danny O'Dwyer
- Gips: Gabe Newell, David Riller, Viktor Antonov, Robin Walker, Bill Fletcher, Marc Laidlaw