I still remember the first time I stepped into the Queen's Mansion in Deltarune Chapter 2. The place felt alive, like a gilded funhouse with a pulse, and somewhere beneath all that polished circuitry a very weird little secret was waiting to be found. I had no idea that chasing a jumpy salesman named Spamton would lead me to one of the most theatrical boss fights in the game. Even in 2026, the Spamton NEO encounter remains a deliciously hidden piece of Deltarune lore, tucked behind a chain of specific steps that are easier to miss than a shadow in a basement full of statues.

Let me walk through how I finally pried this secret open.

Making the Manor Give Up Its Secret

First, I needed to reach the Queen's Mansion. The fight cannot start until then, no matter how much I lingered around earlier areas. From the entrance room, I used the Warp Door to bounce back to the Trash Zone. Spamton's shop was already available because I had defeated him in combat earlier—yes, that little wind-up dealmaker had lost once, and now he wanted to talk terms. Honestly, the whole thing felt like the game was winking at me.

Spamton eventually asked me to fetch an EmptyDisk from the mansion basement. To actually get into that basement, he sold me a KeyGen, which is basically a permission slip for locked doors. After buying it, I warped back to the mansion entrance and headed for the easternmost room on Floor 1F. Past the traffic puzzle, I found a room crowded with statues and paintings. If I had already finished Hacker's blue checkmark quest, Hacker would have pointed out the hidden passageway. In my first run, he was off doing whatever hacker people do, so I had to tap each pixel-art rectangular blue vase until the passage finally revealed itself. Boom—a hidden path.

Down the Basement Rabbit Hole

The newly opened path led me to a room with the basement entrance. The KeyGen let me slip past the forcefield on the right and through the door labeled B1F. I followed the path down to a main area with a save point and a forcefield blocking the passage to the right. Taking the left hallway, I went through the last door into a seemingly empty room. A teacup ride appeared on the left, almost like it had been holding its breath. I rode it down, interacted with the forcefield switch, and rode it back up.

Back in the main room, the right hallway had opened. I walked through a tunnel lined with roller coaster tracks, then through the second door into a room with a decrepit statue tucked into the back right corner. Interacting with that statue rewarded me with the EmptyDisk. That part was surprisingly easy.

A Loaded Twist and the Showdown

I brought the disk back to Spamton at his shop. He wrote over it, handed it back under the new name LoadedDisk, and told me to place it in the basement statue. I returned to the statue room, inserted the disk, and interacted with the statue several times. It insisted nothing happened. I almost believed it. But the game had already set its trap.

When I walked back into the room with the roller coaster tracks, Spamton—now transformed into a new boss form—confronted me. After a short cutscene, the secret boss battle with Spamton NEO began. Let me tell you, that moment hit differently.

My Tiny Checklist

If I ever need to retrace the path quickly, here is the thread to follow:

• Reach the Queen's Mansion, then warp from the entrance to the Trash Zone.

• Visit Spamton's shop after beating him earlier and buy the KeyGen.

• Find the hidden passage in the easternmost room of Floor 1F by tapping the blue vases or using Hacker's hint.

• Enter B1F, take the left hallway, ride the teacup down, and flip the forcefield switch.

• Grab the EmptyDisk from the decrepit statue in the back right room.

• Return to Spamton, get the LoadedDisk, place it back in the statue, and walk back to the coaster tracks.

The Spamton NEO fight is still one of those secrets that rewards curiosity and a touch of stubbornness. Even after all this time, I love how the mansion keeps its weird little promise, hiding a whole boss behind empty rooms and rides that appear only when the game is ready to play.