In the recent That’s Not My Neighbor 2.1.0 update, three new achievements have been added: Nightmare, Nightmare Quiz, and Cosmos. Nightmare requires you to complete a special game mode, while Nightmare Quiz tests your knowledge with seven questions. To unlock the Cosmos, you must answer all of Chester’s questions correctly in Campaign Mode.
Here are the steps and answers you need to unlock all three new achievements.
How to Unlock the Nightmare Achievement
The Nightmare achievement requires you to enter Nightmare Mode and play until you return to Campaign Mode. You don’t need to win or complete every challenge in Nightmare Mode.
Follow these steps:
- Start Campaign Mode and continue playing until you meet a masked person handing out leaflets about the clown.
- Accept the leaflet from him.
- Use the phone and dial 6666.
- When the game asks if you want to enter Nightmare Mode, select Yes.
- Play through Nightmare Mode until you wake up and return to Campaign Mode.
The Nightmare achievement will unlock once you return to Campaign Mode.
How to Unlock the Nightmare Quiz Achievement
To unlock the Nightmare Quiz achievement, you must enter Nightmare Mode and answer seven questions correctly. The questions appear one after another, so you can complete the quiz in a single run.
Use the answers below to win the quiz.
| Question | Correct Answer |
|---|---|
| What is the scientific name of the Australian animal that changes dramatically in appearance outside its natural habitat? | Psychrolutes Marcidus |
| What is the only sport that allows you to punch your opponent in the face for capturing your knight? | Chess Boxing |
| According to F.M.S., global warming is a consequence of the decrease in the number of what? | Pirates |
| What is the last name of the man behind the real face of the mask best known to netizens? | Fawkes |
| What is the name of the hairiest lieutenant of World War II? | Wojtek |
| Which temple is associated with a god who caused the largest pandemic in the darkness of the afterlife? | Zul’Gurub |
| What is the codename of the multicellular organism that can clone anything that touches its rhytidome? | SCP-038 |
Make sure you give each answer carefully. If an answer containing multiple words doesn’t work, try typing it without spaces. For example, enter ChessBoxing instead of Chess Boxing.
How to Unlock the Cosmos Achievement
The Cosmos achievement requires you to answer all six of Chester’s questions correctly in Campaign Mode. After you answer every question, Chester will ask you to join him.
Make sure you deny entry to everyone else so you can focus on Chester’s questions instead of spending time checking visitors.
Answer all six questions using the list below.
All Chester Quiz Answers in Campaign Mode
| Question | Correct Answer |
|---|---|
| What is the meaning of life, the universe, and everything? | 42 |
| What is the number of different permutations of the most relevant Mersenne prime in computing? | 302400 |
| How many elements are in the power set of the set of happy palindromic numbers less than 10,000? | 536870912 |
| How many times must you fold a 0.01 mm thick sheet of paper, at minimum, to cover the distance between the Shire and Mordor? | 38 |
| How many unique permutations does the cardinality of the power set of a set with a number of elements equal to the first happy perfect number have? | 45360 |
| How many numbers smaller than the sum of Chester’s ASCII codes are coprime to that sum? | 358 |
Once you have answered all six questions correctly, Chester will ask you to join him. Select Yes to unlock the Cosmos achievement.
