Timeline

Timeline of Underrail's history and present day events. Incomplete. Heavy spoilers.

The Old World

4th millennium BC

• Start of recorded history
• Millennia of nation states

Unknown time (early space age)

• T6 Group is formed to defend the interests of six supercorporations against nation states
  • (Biocorp, New Frontier Technologies, Security Agency, Bionic Institute, Nucleus Corporation, Transcendix)
• The Old World was on its deathbed, rapidly becoming less and less capable of supporting life
• Each of the supercorporations were seeking their own ways to survive

Unknown time — The Descent

• Also known as End of History
• Biocorp creates Underrail
• NFT establishes four habitats: Lemuria, Horizon, Atlantis and unknown fourth
• Fate of other T6 members is unknown

Post-Descent

Era of old Biocorp

371 years ago (Year 0 Post-Descent)

• The Underrail is created by the original Biocorp
• The dangers of the outside world were deemed too great, Underrail was to be made into a completely self-sustaining environment

341-351 years ago (Year 20-30 Post-Descent)

• Shadowlith is discovered at Abyssal Excavation Site Six

249 years ago (Year 122 Post-Descent)

• Great War between Biocorp and NFT happens
• ACoNR arrives at Abyssal Station Zero. (Last entry in Abyssal Station Zero cargo traffic log: Date: 17. 10. 122. Time: 10:35)
• Lemurian Health Center is left dead following the war against Biocorp Undernavy. (Receptionist standby: 249 years, 7 months, 14 days and 12 hours)

189 years ago (Year 182 Post-Descent) — Hollow Earth Incident

• Underrail became unable to sustain its large population
• Questions of immoral experiments and corruption were raised
• Phenotype Dynamics project plays a large role in the incident
• Revolts occur everywhere, marking the end of the old Biocorp

120 years ago (Year 251 Post-Descent)

• Great Shadow Emission in the Abyssal Station Zero happens, destroying many electronical records and damaging the station (LE-AD: 129)
• Atlantean R&D staff fall under the influence of Flottsørmir

Era of reformed Biocorp

Over 100 years ago

• Biocorp was resurrected by a group of scientists and engineers
• Old places of power restored: Core, Hexagon and Dis
• Biocorp Security Forces are established to maintain peace
• Experiments likely related to Project Ark and Phenotype Dynamics are performed in Depot A

100 years ago (Year 271 Post-Descent)

• Eidein discovers Tchort in Deep Caverns according to the Original Report
• Formation of Institute of Tchort in the abandoned Old Biocorp University

58 years ago (Year 313 Post-Descent)

• Major Tchortist conflicts with the Faceless, Battle of Nucleus

17-18 years ago (Year 353 Post-Descent)

• The Protectorate is formed by General Melek

Era of Protectorate Biocorp

Over 15 years ago

• Protectorate takes over Dis, Biocorp's capital

15 years ago (Year 356 Post-Descent)

• Core City riots occur, days of reformed Biocorp are numbered
• Archibald Knight of Biocorp Security founds Praetorian Security
• Rupert Simmons founds Coretech as a successor to Biocorp
• Biocorp's final dissolution

Few years later

• Civil war on Core City's streets subsides

11 years ago (Year 360 Post-Descent)

• Wallace Steel startss the Free Drones movement

8 years ago (Year 363 Post-Descent)

• Tchortists start exporting medication to Core City

Several years ago

• The Protectorate starts constructing Fort Apogee in Upper Underrail
• Free Drones form a new cell in South Underrail

Less than a year ago

• Hadrian Tanner contracts Oculus to steal something from the Faceless
• Unknown oculite acquires The Cube from the Faceless, passes it on to James Steiner
• Tanner sends Terry and Lora Baker to retrieve the cube from James
• Significant earthquake occurs, parts of Underrail are blocked off and new passages open

Present day

Year 371 Post-Descent

• The player completes Tanner's tests and joins South Gaters
• Cornell steals the cube from Bakers
• The Faceless dispatch patrols to find the artifact, North and South Underrail are cut off from each other
• Coretech acquires the cube for testing, but Tchortists steal it shortly afterwards
• The Faceless invade Institute of Tchort in force
• Tchort is destroyed by the player, the cube returned to Faceless, Tanner flees to North Underrail

Sources

• Oculus database
• Wyatt Pear
• Corban Trenton
• Alvin Bate
• Herve Fontaine
• Institute of Tchort library terminal
• Abram
• Lora Baker
• IRIS
• Azif
• Professor Oldfield