That's Not My Neighbor: Nightmare Mode, Explained

As if That's Not My Neighbor wasn't already difficult enough, Nightmare Mode adds a whole new level of difficulty to the game. While the basic premise of That's Not My Neighbor's Nightmare Mode is the same as the Arcade mode, the key differences lie in how difficult it is to spot impostors and how you are punished for failure.

That's Not My Neighbor: Beginner's Guide

Think your neighbor is a Doppelganger? Here's how to tell.

Nightmare Mode doesn't take place in a normal office building. Instead, you are living inside the Doorman's Nightmare and must survive the Nightmare by weeding out and eradicating any Doppelgangers that come to your window. But be careful! Even the most convincing impostors have tells.

How To Play That's Not My Neighbor's Nightmare Mode

While Nightmare Mode serves as a harder version of the base game, the good news is that the general layout of tasks is the same. In Nightmare Mode, you will have all of the same tools at your disposal in the Nightmare Office and you will use them the same way.

To familiarize yourself with the basic layout and function of all of your office tools, head to the Beginner's Guide for a more in-depth run down of how everything works.

Just like in the regular office, you have a phone, three file folders, a Daily Visitor List, the Viewing Window, Entry Request Forms, I.D.s, and a Checklist. Methodically use each of these diagnostic tools to determine which Nightmare Neighbors are the real deal, and which ones are Doppelgangers trying to eat you.

Differences From Arcade Mode

While the general premise of Nightmare Mode is the same as Arcade Mode, there are a few key differences to note.

The Nightmare Office

The first, and most noticeable difference you will encounter, is the new office. In Nightmare Mode, you won't be nearly as safe behind the window as you were in Arcade Mode, and the appearance of your office will reflect these new dangers.

The Nightmare Office is covered in gore and goo and has a few 'sentient' elements (like the four eye-ball rivets that probably aren't structurally sound) to it that add to the macabre ambiance of your space.

For players with Trypophobia, make sure you've toggled the Trypophobia feature in the settings of the main menu. The Nightmare Office has a set of Trypophobia-triggering holes at the bottom right of the screen. Toggling the Trypophobia filter will cover these holes with gore so that they aren't as obvious.

Insta-Death

The next major difference between Nightmare Mode and Arcade Mode is the implementation of Insta-Deaths.

In the regular mode, you woulstatic.aayyy.com/topic/dn/'t know if you let a Doppelganger in until the end of the round. However, in Nightmare Mode, Doppelgangers will murder you instantly upon being let into the building.

You'll know right away when you've made a mistake. Similarly, killing a Neighbor will result in a haunting, and you'll get a spooky jump-scare on your screen.

Make sure to be as thorough as possible when you are vetting visitors. If you're wrong, you won't get to play any more of the round.

Evil Visitors And The Killer Clown's Card Game

Similar to how Arcade Mode had strange non-Neighbor visitors who would come to your window, Nightmare Mode has its own equivalents of those Neighbors as well.

However, you should be more wary of the new visitors in Nightmare Mode, as each one is more lethal than the last.

Evil Chester, is one of the nicer new characters, and he won't kill you if you lose his quiz, unlike the Killer Clown, who will kill you for losing.

There are a bunch of new Doppelgangers to meet, so keep trying Nightmare Mode until you meet them all. Some have special encounters, like the Mask Ghost who appears three times.

The biggest visitor change is the Killer Clown. In Arcade Mode, the Killer Clown shows up, drops a pamphlet off, and leaves, but in Nightmare Mode, he offers you a game of cards.

Winning the Killer Clowns game or cards irritates him, but keeps you safe while losing results in losing the whole round... and your head.

Nightmare Neighbors

The Neighbors in Nightmare Mode are altogether much different from those in Arcade Mode. The new Neighbors are all spooky and even a little gory. However, despite their disturbing appearances, these Neighbors are still friendly and you still need to protect them from alien Doppelganger invaders.

Nightmare Neighbors have more complex appearances than regular Neighbors and catching cosmetic inconsistencies is much harder than in Arcade mode. Some Nightmare Neighbors like Chaugnar, have Doppelgangers whose appearance is only off by a barely-visible horn tip or incorrect tattoo.

Nightmare Neighbors correspond with regular Neighbors, but their apartments and roommates won't always match up with their human counterparts.

Francis, for example, lives alone in Arcade Mode, but his Nightmare version, Sothoth, lives with his daughter.

No Ranking

Lastly, the final biggest difference is the fact that Nightmare mode does not affect your game rankings. You won't get a letter ranking at the end of your Nightmare. Instead, this game mode functions on a pass-fail system.

Dying, losing the quiz, losing the cardgame, or killing a Neighbor will result in a loss at the end of the Nightmare.

Winning the round means you beat the Nightmare successfully. To do this, let all Neighbors in, and cleanse all Doppelgangers.

The fact that Nightmare Mode rounds don't affect your ranking is a good thing. With how difficult Nightmare Mode can get, it's better not to risk throwing off your letter ranking scoreboard with frequent failures. It also means you can experiment as much as you want in Nightmare Mode without ranking repercussions.

However, because you don't receive a letter ranking at the end of Nightmare Mode, you won't be able to earn achievements like Worse Than Henry or Better Than Henry while completing a Nightmare Mode run.

Nightmare Mode Achievements

Because Nightmare Mode brings with it a whole new set of challenges, so, too, does it bring with it a new set of achievements. There are eight Nightmare Mode achievements to collect in total, and you can find them on page two of your achievements screen in the Record menu.

You can still earn a few regular achievements while playing Nightmare Mode, but you cannot earn any Nightmare Mode achievements in the game's Arcade Mode. The only exception is the Collector achievement, which is earned by collecting all achievements in the game.

Here is the full list of Nightmare Mode Achievements you can collect:

Achievement Name

Description

How To Achieve

Share The Secret

'Welcome '42' as a VIP'

Meet 42.

Peaching

'Welcome Peach as a VIP'

Meet Peach.

In My Restless Dreams

'Welcome the Nurse as a VIP'

Meet the Nurse.

Wake Up!

'Survive the Nightmare Mode'

Successfully survive a round of Nightmare Mode.

Prodigious Mind

'Complete the Evil Chester's quiz'

Solve Evil Chester's quiz with all correct answers. It earns you a permanent 'Chester's Badge' as a cosmetic item in your Nightmare Office.

Boo!

'Get haunted by the Mask Ghost'

Meet the Mask Ghost. She shows up three times. Letting her in is a safe bet as she will not harm you.

Headache

'Be murdered by the Entity'

Kill two Neighbors.

Collector

'Unlock all the achievements'

Earn every achievement in the game, not just Nightmare Mode achievements.

That's Not My Neighbor: How To Solve Chester's Quiz

Need to know the meaning of life? Look no further.