The primary goal of the expedition is to retrieve the (Autonomous Cooperative Nanotech Reassembler) from Abyssal Station Zero .
To successfully claim the device, you must navigate the station's security and reactivate its power, which triggers the same experiment that originally decimated the facility.
Speedrunners, or characters who don’t care about the Black Sea. It’s the most "neutral" but also the most unsatisfying from a narrative perspective. The problem is simply postponed.
The ending you receive in Expedition is not a standalone cutscene; it is a series of epilogue slides that trigger upon completing the expansion’s main questline and returning to the core game. These slides depend on three major variables: underrail expedition ending
Handing it to the shadowy Oculus group is often considered a "lore-heavy" choice, as they possess the knowledge to potentially understand its alien origins.
You can choose who to give this powerful Old World artifact to. Options include: Professor Oldfield : He will bring it to the University of Dis for research. (SGS) : He can take it for study at South Gate Station.
Find the "Mutagen Serum" hidden in the Labyrinth (a high-level dungeon). Instead of destroying the brain node, inject yourself with the serum and touch the Monolith. Pass a Will 10+ check. The primary goal of the expedition is to
If you side with the and activate the Acorn , you gain access to a submerged ancient facility (only reachable after the main game ends). Inside:
: Their fate depends on the Shadowlith . If you destroy the Shadowlith shard, the natives are released from its corruptive influence and can live peacefully. If the shard remains, they continue as violent conquerors. The ACoNR (Acorn) :
Before dissecting the endings, a quick summary: You join an Aegis Inc. expedition to the Black Sea to salvage pre-WWIII (the "Flash") technology. You quickly discover a sentient, fungal-based hive mind (the Abyss) that communicates through a monolith. Two hostile factions vie for control: the (exiled Aegis members who worship the Abyss in a twisted way) and the Natives (Lizardmen who want to exterminate all surface dwellers). It’s the most "neutral" but also the most
(Oculus) : Providing it to the Hidden City allows them to potentially use its secrets for the benefit of humanity. :
The ending of the expansion is a complex web of player choices, factional outcomes, and deep lore revelations that extend far beyond a simple final boss fight. Unlike the base game’s more linear conclusion, Expedition offers multiple "layers" of endings that impact the fate of the Black Sea and your own character's legacy. 1. The Core Objective: The ACoNR