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Half-Life is a series of games associated with the Half-Life universe. The first game, Half-Life, was released by Valve in 1998, receiving critical acclaim and numerous awards, leading them to release numerous spin-offs and continuations of the series.

The Portal series also takes place in the same time frame as the Half-Life series, causing the two to be intertwined, but do not directly affect each other.

Half-Life: Alyx, a virtual reality-exclusive game in the Half-Life series, released on March 23, 2020, making it the latest game to release since Half-Life 2: Episode Two's debut in 2007.

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