Half-Life inspired numerous fan-made mods, some of which became standalone games, such as Counter-Strike, Day of Defeat and Sven Co-op. In 2020, Crowbar Collective released an unofficial remake, Black Mesa. Valve ported Half-Life to its Source engine as Half-Life: Source in 2004. It was ported to the PlayStation 2 in 2001, along with the expansion Half-Life: Decay, and to OS X and Linux in 2013. It was followed by the expansion packs Opposing Force (1999) and Blue Shift (2001), developed by Gearbox Software. By 2008, it had sold over nine million copies. It is considered one of the most influential FPS games and one of the best video games ever made.
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Half-Life received acclaim for its graphics, realistic gameplay and seamless narrative, and won over 50 PC " Game of the Year" awards. Science fiction novelist Marc Laidlaw was hired to shape the story and assist design.
Valve developed using GoldSrc, a heavily modified version of the Quake engine, licensed from id Software. Valve co-founder Gabe Newell said that the team was disappointed with the lack of innovation in the FPS genre, and aimed to create an immersive world rather than a "shooting gallery". Unlike other games of its time, the player has almost uninterrupted control of the player character, and the story is told mostly in scripted sequences rather than cutscenes. The gameplay consists of combat, exploration and puzzle-solving. Players assume the role of Gordon Freeman, a scientist who must escape the Black Mesa Research Facility after it is invaded by aliens. It was Valve's debut product and the first game in the Half-Life series. This relationship enables the determination of all values, as long as at least one is known.Half-Life is a 1998 first-person shooter (FPS) game developed by Valve and published by Sierra Studios for Windows. Using the above equations, it is also possible for a relationship to be derived between t 1/2, τ, and λ. Derivation of the Relationship Between Half-Life Constants This means that the fossil is 11,460 years old. If an archaeologist found a fossil sample that contained 25% carbon-14 in comparison to a living sample, the time of the fossil sample's death could be determined by rearranging equation 1, since N t, N 0, and t 1/2 are known. N t is the remaining quantity after time, t The carbon-14 undergoes radioactive decay once the plant or animal dies, and measuring the amount of carbon-14 in a sample conveys information about when the plant or animal died.īelow are shown three equivalent formulas describing exponential decay: It is incorporated into plants through photosynthesis, and then into animals when they consume plants. The process of carbon-14 dating was developed by William Libby, and is based on the fact that carbon-14 is constantly being made in the atmosphere. The half-life of carbon-14 is approximately 5,730 years, and it can be reliably used to measure dates up to around 50,000 years ago. One of the most well-known applications of half-life is carbon-14 dating. The term is most commonly used in relation to atoms undergoing radioactive decay, but can be used to describe other types of decay, whether exponential or not. Half-life is defined as the amount of time it takes a given quantity to decrease to half of its initial value.
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