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  2. Unreleased Half-Life games - Wikipedia

    en.wikipedia.org/wiki/Unreleased_Half-Life_games

    As developing Half-Life 2 and the original Source engine simultaneously had created problems, Valve delayed development of a new Half-Life until Source 2 was complete. [28] In 2017, the Half-Life writer, Marc Laidlaw, released a short story that journalists speculated was a summary of the Episode Three plot. [26]

  3. Technetium-99m - Wikipedia

    en.wikipedia.org/wiki/Technetium-99m

    This is still a short half-life relative to many other known modes of radioactive decay and it is in the middle of the range of half lives for radiopharmaceuticals used for medical imaging. After gamma emission or internal conversion, the resulting ground-state technetium-99 then decays with a half-life of 211,000 years to stable ruthenium-99 ...

  4. Black Mesa Research Facility - Wikipedia

    en.wikipedia.org/wiki/Black_Mesa_Research_Facility

    The Black Mesa Research Facility (also simply called Black Mesa) is a fictional underground laboratory complex that serves as the primary setting for the video game Half-Life and its expansions, as well as its unofficial remake, Black Mesa. It also features in the wider Half-Life universe, including the Portal series.

  5. Half-life - Wikipedia

    en.wikipedia.org/wiki/Half-life

    Half-life (symbol t ½) is the time required for a quantity (of substance) to reduce to half of its initial value.The term is commonly used in nuclear physics to describe how quickly unstable atoms undergo radioactive decay or how long stable atoms survive.

  6. Half-Life (series) - Wikipedia

    en.wikipedia.org/wiki/Half-Life_(series)

    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.

  7. Delta Particles - Wikipedia

    en.wikipedia.org/wiki/Half-Life:_Delta

    Delta Particles, formerly known as Half-Life: Delta, is a game modification of Half-Life created by Russian developer Yuri "XF-Alien" Epifantsev, released on October 29, 2021. [1] The mod was under development for twelve years, dating back to August 2009, and Epifantsev stated that Delta was their "largest and oldest project" and was "glad to ...

  8. Half-Life (video game) - Wikipedia

    en.wikipedia.org/wiki/Half-Life_(video_game)

    Half-Life is a first-person shooter that requires the player to perform combat tasks and puzzle solving to advance through the game. Unlike most first-person shooters at the time, which relied on cut-scene intermissions to detail their plotlines, Half-Life ' s story is told mostly using scripted sequences (bar one short cutscene), keeping the player in control of the first-person viewpoint.

  9. Source (game engine) - Wikipedia

    en.wikipedia.org/wiki/Source_(game_engine)

    A screenshot of Half-Life 2: Episode One. The high-dynamic-range rendering and Phong shading effects are evident. The Source 2006 branch was the term used for Valve's games using technology that culminated with the release of Half-Life 2: Episode One.