Island

The island is an unnamed island somewhere in the Norwegian Sea. The events of the series take place on this very island.

1600-1800's.
During a unstated period of time, a group of pirates took up shelter underground. Royal Navy sailors - likely in pursuit - evetually arrived. In both cases, they both perished to unknown causes. Not much is known, other than the effects of the disease are similar to the mysterious disease.

WWII
During WW2, an advanced underground complex of bunkers was built in order to provide coastal defences for the island.

Post-WWII
After WW2, the underground complex was abandoned by military and Tempest water treatment facility was built in the lower levels of the complex to supply the water to the population of the entire island. A local medical manufacturer Philips Pharmaceuticals have expanded and started researching new types of cures. In 70s, the satellite station on the island was decommissioned.

Pre-Estranged
A megacorporation named "Arque" acquired both Philips Pharmaceuticals and Tempest water treatment facility and started researching the algae naturally occuring on the island. An outbreak of mysterious disease happens and Arque send their security forces to clean up the situation.

Geographical location
The island is situated somewhere in Norwegian sea.

Redton

 * Docks
 * Lighthouse
 * Natural Reserve
 * Train station
 * John's hut

Wenthworth

 * Sewers
 * Tempest water treatment facility

Arque Research Facility

 * Liam brother mines
 * The Hut
 * Offices
 * Armory
 * Communications room
 * Warehouse
 * Construction site
 * Brig

List of appearances
Estranged : Act I  (First appearance) Estranged : Act II