Top Definition
Half-Life is a revolutionary game for computer; more need not be said.

An element's half life is the period of time it takes for half of the radioactive isotopes to decay. It is ibnot/b/i used to describe the dissapation of something not radioactive(subliminal hintcaffeine for instance /subliminal hint)
Random_Gaming_Publication: And our game of the year award goes to... Half-Life
The_rest_of_the_word: ... really? *yawn*

Random_Chem_1_teacher: The radioactive half-life of carbon60 is approximately 6000 years.
by opium April 30, 2003
Photos & Videos
1. The length of time needed for half the atoms of a radioactive isotope sample to decay
2. A sweet game
We are learning about Half-Lifes in Science.

I pwn at Half-life 2.
by Kupo December 21, 2004
It was awarded "Game of the Year" by over 50 publications for its debut in 1999.

I need not say more then this;
"Best Game of All Time" - PC Gamer
Half-Life was named "Best Game of All Time" by PC Gamer magazine in its November, 1999 issue.
by XxKenjiYamaguchi July 06, 2004
A very good computer game that gets abused by HALO zombies. Basic single player owns. Got lots of addictive mods.
Half-Life owns. And Half-Life 2 will own HALO2
by Gungsta-Pasta August 04, 2003
Best freakin fps ever.
Anthony hates Half-life

Eighth grade girls delayed half-life 2. Kill them
by bladeguy4543 May 25, 2004
Released on October 31, 1998, Half-Life is a first-person shooter for the PC. It is widely considered as one of the greatest shooters ever made due to its expansive world, story, and delivery of gameplay. The game includes no cut-scenes or dialogue text, helping you engross in the game as if you were really in it. Almost all shooters of today take something from Half-Life, Halo as a good example. Even 8 years after its release, people still play and create MODs for it, Counter-Strike being the most popular. It has had a long awaited sequel released in 2004.

The historical importance of the game in video gaming will remain as long as shooters exist. It was the first FPS to not have levels or stages and the first to not introduce you with a weapon at the start (you begin on a tram on your way to work-- an ordinary day gone wrong to say the least). Gamespy awarded Half-Life with the second best game ever made, and PC gamer declared it as the best PC game as of 1999.
"Half-Life is the closest thing to a revolutionary step the genre has ever taken. -Gamespot"

"Nothing half-assed about it--this has to be the finest shooter ever crafted."

"Everything about Half-Life smacks of quality: the storyline, the gameplay, the graphics, the sound effects and last, but not least, the obvious level of committment Sierra and Valve have invested in it. Half-Life is, without doubt, the best PC game I have ever played. Ever. -Yahoo! Games"
by Sharkhunter August 27, 2006
1 : the time required for half of something to undergo a process: as a : the time required for half of the atoms of a radioactive substance to become disintegrated b : the time required for half the amount of a substance (as a drug or radioactive tracer) in or introduced into a living system or ecosystem to be eliminated or disintegrated by natural processes
2 : a period of usefulness or popularity preceding decline or obsolescence <slang usually has a short half-life>
For americium-241, it is known that half of the atoms decay in 458 years. Therefore, 458 years is the half-life of americium-241. Every radioactive element has a different half-life, ranging from fractions of a second to millions of years, depending on the specific isotope. For example, americium-243 has a half-life of 7,370 years.
by Mark January 06, 2004
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