Half-Life universe
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Valve Corporation

Valve Corporation
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The Half-Life and Portal universe, also known as the Half-Life universe or the Portal universe, is a science fiction universe created by Valve Corporation in 1998, with the release of the video game Half-Life on the PC platform. It is told through four related story arcs, each stemming from a game: Half-Life, Half-Life 2, Portal, and Portal 2.

Video games
Half-Life 3Half-life 2: Episode TwoHalf-life 2: Episode OneHalf-Life 2Portal 2PortalHalf-Life

Half-Life 3

Half-life 2: Episode Two

Half-life 2: Episode One

Half-Life 2

Portal 2

Portal

Half-Life

PC game expansions
Half-life: DecayHalf-life: Blue ShiftHalf-life: Opposing ForceHalf-life 2: Lost Coast

Half-life: Decay

Half-life: Blue Shift

Half-life: Opposing Force

Half-life 2: Lost Coast

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