Full Half-life Timeline By Whythough 1822 Red, Blu, and Gray are born 1850 Zepheniah Dies 1890 Invention of Immortality 1891 City 17 is Founded 1918 Cave Johnson is Born 1927 Caroline is Born 1943 Cave Johnson founds Aperture Fixtures 1944 Cave Johnson buys Salt mine in Upper Michigan 1944 Richard Keller is Born 1947 Aperture Fixture Rebrands to Aperture Science 1947 Wallace Breen is Born 1947 Black Mesa Begins Construction 1960 Isaac Kleiner is Born 1960 Blu's Machine is Repaired 1961 Russel is Born 1961 Test Shaft 09 is Closed 1961 Arne Magnusson is Born 1962 Development of GLaDOS 1963 Eli Vance is Born 1968 Collette Green is Born 1968 Aperture Declares Bankruptcy 1968 Hearing regarding Disappearance of Astronauts 1968 Gravel War 1969 Discovery of the internet 1971 Gray Returns 1971 Robot War 1971 Blu and Red Die 1972 Robot War 1972 Assemble the Team 1976 Aperture Changes Test Demographic 1976 Chell is Born 1976 Gordon Freeman is Born 1978 Gina Cross is Born 1980 Judith Mossman is Born 1981 Cave Johnson Purchases Moon Rock 1981 Adrian Shephard is Born 1981 Take-A- Wish Foundation is Born 1982 Gordon Freeman makes butane powered tennis ball cannon 1983 Barney Calhoun is Born 1983 Girls of Aperture Science Calander is sold 1987 Bring your Daughter to work day 1987 First Activation of GLaDOS 1987 Cave Johnson is Dead 1987 Borealis is Lost Dec 4, 1987 Scout Dies 1989 Multiversal testing Begins 1996 Red Phone Plan is set in motion 1997 Gordon Freeman goes to Austria 1998 Aperture Testing becomes more Difficult 1999 Alyx Vance is Born 1999 Gordon Freeman Receives Doctorate May 16, 2003 Azian Vance Dies May 16, 2003 Resonance Cascade May 16, 2003 GLaDOS Executes Aperture May 17, 2003 Gordon and Adrian are put in Stasis May 17, 2003 Collette Green possibly Dies May 17, 2003 Nilinthe is Defeated May 17, 2003 Collette and Gina Reverse the Cascade May 17, 2003 Gina Cross Dies May 20, 2003 7 Hour War May 20, 2003 Combine gain Control 2010 Chell Destroys GLaDOS 2010 Rattman Possibly Dies 2018 Alyx Saves her Father and Creates a Parellel Timeline where she is Hired May 17, 2023 Combine Attack Black Mesa East May 17, 2023 Eli Vance is Captured May 17, 2023 Alyx Saves Gordon from Stasis May 18, 2023 Grigori helps Gordon out of Ravenholm May 19, 2023 Attack on Nova Prospekt May 19, 2023 Gordon and Alyx Disappear May 26, 2023 Attack on the Citadel May 26, 2023 Communications Lost May 26, 2023 Gordon put back in Stasis May 26, 2023 Gordon and Alyx Appear in Kleiners Lab May 29, 2023 Gordon is Freed from Stasis by Vortigaunts May 29, 2023 Super Portal is Created May 29, 2023 Gordon and Alyx Stabilize the core May 29, 2023 Gordon Freeman and Alyx save Survivors 2060 Chell is Reawoken by Wheatley 2060 GLaDOS is Reawoken 2060 Wheatley Gains Control 2060 Wheatley is Launched into Space