This is by far the hardest achievement to unlock in this game. To do so, you have to intentionally fail recruiting each of the 4 potential companions:
- Hope: refuse to moderate her live chat
- D'Angelo: be rude to him, try to be as unhelpful as possible with his investigation, ring Robert's doorbell when given the option and then proceed to be as rude and aggressive as possible with Robert. It actually is kinda hard to get D'Angelo to dismiss you as a potential partner on that first night.
- Agathon: refuse to help Agathon on his quest
- Tamika: insult her brother, then tell Tamika she should keep a leash on her pet and then tell her he is keeping her down and that should be enough for her to cast you out
The achievement will unlock when Kaiser and his ghoul come to your rescue with no companion in sight.