Who you gonna call? Wait, wrong franchise!
- In the PSA mission "Secret of the Fur," you're warned about a monster that you must track down and identify. It broke the coffee machine in the Coffee Shop. When you enter the Ski Lodge, you'll see a terrified penguin hiding under the couch cushions and telling you about a monster outside. If you go outside, there's a shadow of a tall creature with claws that moves rather smoothly. As soon as you enter the room, ominous loud music starts blaring
, which can be easily startling as the missions have almost no music. - The end of the PSA mission "The Veggie Villain" has the PSA stuck in their HQ with a popcorn bomb courtesy of Herbert, which is treated just as dangerous as a real explosive. Eventually after Dot manages to teleport everyone out, the bomb detonates, destroying the Sports Shop and the PSA HQ. Given how destructive the explosion was considering the aftermath, it likely would've killed everyone in the building.
- There's a very rare chance that in Aqua Grabber's Clam Waters level, the screen will shake and a giant, shadowy squid will shoot up into view before swimming away. It can't harm you, but it is very big and lingers around for a while. If you're not expecting it, it can be quite terrifying. The squid used to make a loud screech, but the sound was later removed.
- During Operation: Hot Sauce, the Pizza Parlor's music was changed to a slowed down, distorted version of its usual theme. It stays even after you beat the mission.
- The Halloween parties were rather spooky. One recurring party room was the Haunted House, which involved moving statue heads, a coffin of puffles (still alive), and floating instruments that played at random. There was a door that you could open to reveal some colored lights and then a random event, including a pumpkin that grows rapidly before the door closes or a penguin skeleton that shakes.
- The Medieval Party 2012 had a room called Dragon Path. If you idle in the room long enough, you hear a surprisingly loud demonic screech timed with a rock falling down the mountain.
- Operation: Blackout is Club Penguin's Darkest Hour. Herbert successfully blocks out the sun, and as the party goes on, the island gets increasingly darker and snow starts piling up. The EPF agents are captured by Herbert, and eventually, you're the only one left. Even the login screens have intense close-ups of Herbert saying phrases like "Enjoy it before I destroy it!" and "The island is DOOMED!"
- The 10th Anniversary Party has robots of the mascots that tell you about past parties. Eventually, they start breaking down and turning evil, with glowing eyes and evil expressions. Their dialogue cuts off halfway through with errors and corrupted text. Fittingly, they're the main focus of the 2015 Halloween Party, in which you must use depictions of the mascots' fears to deactivate them.
- Pictured above is Skip, the main antagonist of the 2014 Halloween Party. At first, he appears as a friendly bellhop that helps the player investigate the hauntings of the Puffle Hotel and find Gariwald VIII, though he strangely discourages the player from going to the 13th floor, which is already suspicious. Once the player successfully captures the Ghost Puffles, Skip traps the player in the cage and reveals himself to be a ghost as well as the one who captured Gariwald, as well as revealing that he tricked the player into catching the Ghost Puffles so he could use them for his grand plan: To haunt all of Club Penguin for all eternity. This particular line from him once the player faces him on the 13th floor really sells the Fridge Horror behind him haunting the island for all of eternity:"You thought the Puffle Hotel was scary? Wait 'til you see what I have lined up!"
- Skip's reveal as a ghost also shows his face change from a friendly penguin's face to a devious grinning face with glowing pupils surrounded by dark sclera, as well as a Sickly Green Glow around his body. His true appearance adds a Jagged Mouth and a large build and the result is a ghost that no one wants haunting the island and will certainly haunt kids' nightmares.
