This section contains a list and walkthroughs of all side quests connected to Commander Walther Dahl. The quests are unlocked in the final part of the main story, and their choice depends on certain pre-requisites. Completing them can influence the outcome of the game, and allow you to score certain achievements.
This variant is available if you've managed to save Dr. Dayo Igwe by freeing him from a floating cargo, which took place during one of the side quests (Side Quests -> Shuttle Bay -> Doctor Igwe). Soon after the revelation in The Keys to the Kingdom (a message from Alex Yu ordering you to take care of Dahl) Morgan will be contacted by Igwe, who will suggest a solution that allows you to spare Dahl.
Make your way to Yu's office in Talos I Lobby to meet up with Igwe. Talk to him to learn of a possibility to capture Dahl and remove his neuromods, which should deprive him of his recent memories and revert him back to a peaceful state. As a result, your mission will be to capture Dahl alive without killing him.
BEFORE you proceed with the mission, Make sure that you are equipped with the Disruptor Stun Gun (you can fabricate it provided you are supplied with the needed blueprint, or simply find one in one of the numerous locations around the station) which is the key item when considering this variant. Wait for Dahl to reveal his location, which should take place when left with Dahl's Ultimatum. The opponent is waiting for you in Oxygen Flow Control Room in Life Support.
The vicinity of your destination is defended by military operators and Phantoms. The room itself is clear. Equip the Disruptor Stun Gun and use it to incapacitate Dahl.
The body will be delivered to Neuromod Division without your help. Take care of other tasks (e.g. finding the tech officer) and wait for a new message from Dayo Igwe who will inform you that Dahl's body is in Neuromod Division and he is making final preparations before the procedure.
Travel to Neuromod Division and access the Neuromod Insertion Room located on level three. Reach the circular ward to encounter both characters.
You need to help Igwe perform the neurotomy, which means completing a number of steps in strict order. Approach the surgery console and begin with sending following orders:
- Engage Surgical Harness
- Perform Neural Scan
- Perform Neurotomy
The surgery will be successful, enabling you to gain a new ally. Dahl will be convinced to help the remaining inhabitants in escaping the station (you'll receive a new achievement - This Never Happened). The quest ends with an open ending. If you'll choose an ending in which the remaining crew members escape using Dahl's shuttle, Dahl will be the one to pilot the vessel.