One of Quentin Tarantino's favorite computer games, Half-Life is among the productions the famous director would like to adapt for the screen one day.
In the game's files there is an extended line G-Man says when you refuse his offer. After saying, 'It looks like we won't be working together. No regrets, Mr. Freeman,' G-Man adds the comment, 'a few survivors of your personal holocaust want to meet the man responsible for the total annihilation of their race.'
Fans created a Half-Life remake called Black Mesa (2012) using the latest version of the Source engine. Featuring completely overhauled graphics, new character models and some new voice acting, this production was fully supported by Valve, the creators of the original game.
Some of the security doors in the game bear the words 'Security 7G.' This is a reference to Homer Simpson in The Simpsons (1989) being the safety inspector of Sector 7-G at the Springfield Nuclear Power Plant.
Half-Life held the title of the best-selling first-person shooter of all time for a full 13 years, until Call of Duty: Modern Warfare 3 (2011) was released.
Artillery bombardments occur frequently throughout the game. The 'whistling' sound heard before the explosion is the characteristic sound of the German-made Flak 88 gun.
Military units first appear in the chapter 'We've Got Hostiles!' and are last seen in the chapter 'Forget About Freeman!' Apparently no soldier ever managed to reach the Lambda Core.
The names on the lockers in the bathroom at the start of the game, and on the footlockers in the training level of Half-Life: Opposing Force (1999), belong to the people who worked on both games.
Inside Freeman's locker is a book titled 'The 37th Mandala.' This book was written by Marc Laidlaw, the writer of Half-Life.
Half-Life is the first game to use the CD key copy protection system for online play.
The game contains only four types (four hundred) of scientists and one type of security guard.
The hero, Gordon Freeman, does not utter a single word throughout the game.
Half-Life is the first game developed by its creators, Valve Corporation.
The announcement system in Black Mesa is made up of individual words rather than whole sentences. This allows level designers to dynamically generate announcement messages. Most of these words are not used in the game itself, but were created so that independent level designers could make realistic announcements for their own levels instead of sticking to the defaults.
Half-Life: Blue Shift (2001) was originally designed as an exclusive extra for the Sega Dreamcast version of Half-Life. When the Dreamcast version was canceled due to the console's low sales and its approaching end, the developers Valve and Sierra decided to release the Blue Shift expansion for PC.
The game is built on the Quake (1996) engine and supports skeletal animation with Direct3D hardware acceleration.
The fictional military unit in the game uses a wide variety of military vehicles that exist today. These vehicles include the M1 Abrams Main Battle Tank, the M2 Bradley Infantry Fighting Vehicle, the AH-64 Apache Attack Helicopter, the V-22 Osprey and the F-16 fighter jet.
In the game's office complex chapter, before the flooded room, you can see a sign pointing in the direction of Dr. Newell. Newell is the surname of the game's creator, Gabe Newell.
A Dreamcast version of the game was planned, but it was canceled due to slow loading times. Even so, it is possible to come across rare copies of the canceled Dreamcast game on eBay/Amazon from time to time.
The PS2 version of the game came with a co-op mode and better graphics.
The security guards were actually going to be your enemies right after the resonance cascade. Barney would almost never have owed you that beer.
Level designer Dave Riller put his surname into the game at least twice. The first is as a surname on the locker at the start of the game; the second is as a well-known 'Easter egg' hidden beneath a HECU outpost on the map 'c2a2c,' in the Materials Transport chapter. The second time, the surname can only be seen from a certain angle.
The game uses a heavily modified version of id Software's Quake engine (GoldSource, or Goldsrc for short); this engine carries some similarities between Quake and Half-Life.