This timeline describes events mentioned in the early games, Mean Streets and Martian Memorandum. This continuity is not considered canonical or stable, at least in comparison with the later games designed by Aaron Conners.
- 80mil years ago
- An astronomical disaster rips away the atmosphere of Mars and destroys the Martian civilization. They put the Oracle Stone in a protective enclosure for a future race.
- 16th century
- Creation of the Maltese Fruitcake
- Alcatraz ceases operation as a prison
- Overlord project is developed in England
- c. 1983
- Birth of Frank Schimming
- Birth of John Klaus
- c. 1984
- Birth of Lowell Percival
- c. 1988
- Birth of Aaron Sternwood
- Birth of Ed Bradley
- Terraforming of Mars begins
- c. 2003
- Birth of Larry Hammond (and Darrell)
- c. 2004
- Birth of Big Dick Castro
- c. 2005
- Birth of Sandra Larsen
- Birth of Tex Murphy
- Birth of Deacon Hawke
- Birth of Jane
- Doctor Linsky enters the University of San Francisco
- c. 2019
- C-770 Interplanetary Cargo Shuttle is being produced
- D-Day attack. Collier Stanton is lost before his trial. (the event must have happened in 2017)
- Lawrence Barkley changes Alexander's appearance
- Marshall Alexander founds Terraform Corp
- Marshall Alexander marries Nora Desmond Alexander
- Law and Order begins as a small band of trouble makers.
- December 1
- Mick Flemm is charged for arson and attempted fraud and is sentenced 4 years
- Thomas Dangerfield discovers that Marshall Alexander is Collier Stanton
- Tex's Lightning Bolt speeders is produced
- Schimming replaces Gideon as president
- Robert Knott becomes president of Law and Order.
- MTC invites the Law and Order party for a joint project to get rid of the mutants
- Larry Hammond creates the Nexus computer
- MTC starts hiring scientists for project Overlord
- June 22
- Davis manages to manipulate elements of ape behavior
- Linsky starts dating Sandra Larsen
- Linsky takes a life insurance from TransAmerica Insurance Company
- July 10
- Davis controls visual images to the ape's brain, impulses of pleasure and pain.
- July 16
- Davis' subject has a massive seizure and berry aneurism which killed it.
- July 26
- Davis has completed experiments on chimps.
- August 10
- Linsky writes in his computer about finding colleagues
- Davis denies to test his procedure on a human
- Brenda Perry starts working in MTC
- August or September
- Invoice for Precious Metal Inc. gallium arsenide to Cal Davis
- (2 days later) Death of Cal Davis
- Greg Call is murdered.
- September 1
- Linsky considers obtaining all passcards and passwords
- September 10
- Linsky realizes that once someone finishes with his role in Overlord, is eliminated.
- September 16
- A week after Linsky finishes his work on Overlord, considers talking to Gideon.
- Saturday, September 20
- Linsky has severe headaches.
- Linsky is seen jumping the Golden Gate Bridge
- Sunday, September 21
- Linsky's body is recovered by Police divers
- September 23
- Sylvia Linsky visits Tex Murphy
- Wednesday, September 24
- Linsky's funeral held at the All Saints Church, 10:00.
- September 25
- Events of the Mean Streets
- Late September
- Bosworth Clark is killed.
- Robert Knott is killed.
- October 3 or 5
- Scheduled activation of Overlord (foiled by Tex Murphy)
- 20 viewers are fried in Los Angeles by Joltovision
- Martian Memorandum case. The Oracle Stone is returned to Deacon Hawke.
- ↑ Said to be in his eighties
- ↑ Said to be in his late 60s
- ↑ Said to be about 45
- ↑ Said to be about 45
- ↑ Said to be in his early 40s
- ↑ Said to be in her late 20s
- ↑ Says he is 30 years old to Rhonda Foxworth but he could as well mean that he is "in his 30s"
- ↑ 8.0 8.1 8.2 8.3 Newspapers in Fedora's home
- ↑ 10 months before MS
- ↑ 8 months before MS
- ↑ "about 6 weeks ago"
- ↑ Tom Griffiths in MS says "a few weeks ago" so presumably about a month or less before the game
- ↑ Robert Knott dies if Tex visits him and asks him about Gideon Enterprises.
- ↑ Carl Linsky marked Oct 3 as doomsday in his warehouse
- ↑ In Law and Order HQ a note from Robert Knott states Oct 5 is the day they officially control the world