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The developer of the Half-Life series, Valve, was founded in 1996 in Kirkland, Washington by the former Microsoft employees Mike Harrington and Gabe Newell. Valve began working on the first Half-Life soon after formation, and settled on a concept for a horror-themed 3D action game, using the Quake engine as licensed by id Software.
In this situation it is generally uncommon to talk about half-life in the first place, but sometimes people will describe the decay in terms of its "first half-life", "second half-life", etc., where the first half-life is defined as the time required for decay from the initial value to 50%, the second half-life is from 50% to 25%, and so on.
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On November 23, 1999, GameSpot reported that 2015, Inc. was developing a Half-Life expansion pack to follow Half-Life: Opposing Force. 2015, Inc declined to comment. [1] On March 18, 2000, the Adrenaline Vault reported that the new expansion was named Half-Life: Hostile Takeover, and that it had appeared on retail product lists with a release date of late August. [2]
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This is a list of radioactive nuclides (sometimes also called isotopes), ordered by half-life from shortest to longest, in seconds, minutes, hours, days and years. Current methods make it difficult to measure half-lives between approximately 10 −19 and 10 −10 seconds.
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