Timeline

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

Timeline of Underrail

Era of old Biocorp

Centuries ago

• 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

150-200 years ago — 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

Over 100 years ago

• Experiments likely related to Project Ark and Phenotype Dynamics are performed in Depot A

100 years ago

• Eidein discovers Tchort in Deep Caverns
• Formation of Institute of Tchort in the abandoned Old Biocorp University

Era of reformed Biocorp

50-100 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

58 years ago

• Major Tchortist conflicts with the Faceless, Battle of Nucleus

Era of Protectorate Biocorp

Over 15 years ago

• Protectorate takes over Dis, Biocorp's capital

15 years ago

• 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

8 years ago

• 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

• Significant earthquake occurs, parts of Underrail are blocked off and new passages open

Present day

• The player completes Tanner's tests and joins South Gaters

• Cornell acquires a mysterious cube-like object that belongs to the Faceless
• The Faceless dispatch patrols to find the artifact, North and South Underrail are cut off from each other
• Coretech acquires the artifact for testing, but Tchortists steal it shortly afterwards
• The Faceless invade Institute of Tchort in force

Sources

• Oculus database
• Wyatt Pear
• Corban Trenton
• Herve Fontaine
• Institute of Tchort library terminal