Timeline

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

Timeline of Underrail

This section needs expansion with events and details concerning Underrail's history.

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