Forgotten Treasures

Overview

Forgotten Treasures is a Sonar Station upgrade from Season of the Deep. Once unlocked, it gives a chance at an extra Deep Engram each time a Salvage or Deep Dive key is redeemed.

Acquisition

Unlock it by completing three jobs within a single Salvage activity as a fireteam. Deep Engrams are stored on the Sonar Station vendor screen rather than in the engram inventory, and the Deep Engram Decoding menu can focus them into specific seasonal gear once the relevant upgrades are unlocked. The sources describe the season's launch, so check the in-game Seasonal Bonuses tab for current requirements.