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

Unknown time (Year 2680-2685)

Experiments related to the Pasithee Program take place in The Compound
- Security Agency, Bionic Institute, Nucleus Corporation and Transcendix cooperate with Biocorp during the research

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

Disunion takes place in Abyssal Station Zero (About a century 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

Gunnar Edstrom arrives to Core City and founds JKK
Oligarchy is formed by Knight, Simmons and Edstrom
Civil war on Core City's streets subsides

11 years ago (Year 360 Post-Descent)

Wallace Steel starts the Free Drones movement

8 years ago (Year 363 Post-Descent)

Tchortists start exporting medication to Core City

5 years ago (Year 366 Post-Descent)

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