One of the side quests that you can perform during your stay in Roseway is The Doom That Came to Roseway. This page of the guide to The Outer Worlds has a walkthrough for this quest.
List of objectives
- Investigate the call for help;
- Find Anton's safe;
- Eliminate criminals (optional);
- Take care of the Raptidons (optional);
- Recover Anton's data;
- Prepare a way to retreat;
- Free Cassandra;
- Talk to Anton.
The task is activated during a conversation with Gladys on the Groundbreaker. However, the entire quest takes place in Roseway. When you get to the city, you have to talk to Anton - he will tell you about his research, which was captured by outlaws. If you agree to help him, you will receive a key to the laboratory and the access code.
Research and Cassandra O'Malley
Go to the secret laboratory. This area is guarded by outlaws, so you will have to fight.
As soon as you enter inside, you will encounter Porter and his squad. Talk to him and to learn what is happening. In addition, if your persuasion is sufficiently high, you can convince him to give you his card to the office - you will need it later in this quest.
Then, go deeper into the building. While traversing the corridors, you will come across guard robots and outlaws - defeat them.
At some point, you will get into the dining room. Go through it and go through the passage without doors. You get to the place where Cassandra O'Malley is kept. Talk to the woman - she will ask you to let her out. In addition, if you have a sufficiently developed persuasion, you can convince her to make the outlaws stop attacking you.
To release Cassandra, you will need to print out the lab security card. The room where you can create this item is closed. You can open it in two ways - using the lockpick ability or using the card obtained from Porter.
Once you get the map, you still need to clear an escape route for Cassandra. To do this, go further down the corridor where the woman is, and go to the room in front of you. There, you will find a group of Raptidons. Kill them and then go back to free the woman.
The door to the room where Cassandra is kept can be found by passing through the door located in the same corridor that led you to the Raptidons. These creatures are in this room, too - kill them and free the woman. You can now decide her fate. You can kill her and take her research or convince her to give it away.
In addition to the outlaws, the lab is also full of Raptidons. However, you will kill most of these creatures while preparing an escape route for Cassandra O'Malley. There is one particularly strong group here. It is in a room accessed by a staircase leading down from the corridor where you meet Cassandra.
While fighting this group, be on the move at all times to avoid acid and their charge. Eliminate the smaller creatures first.
Finally, go back to Anton and give him research or sell it to Gladys on the Groundbreaker.