Volume 4 - Chapter 4: Dinner Guests
If Chip died then from the start of Volume 4 Taraneh will join the group. In every interaction you have with her throughout Volume 4 make it negative. I also expressed negative views on her to the group during interactions. This also includes when you can optionally approach her and speak to her at the hideout between chapters.
In Chapter 3 I disagreed with Taraneh's plan to book an appointment with the bank manager. However it will still happen so you need to screw it up by insulting the bank manager: select the
option each time. Reineldinho1981 has said that they did not speak to Taraneh at all throughout chapter 4 and she ended up betraying the group.
Taraneh will eventually betray the group in Chapter 4 when Pavoni and Orso will attack the hideout. You will see her leave the building with a bag. After playing through the chapter the achievement will automatically be unlocked at the end.