Alright, this is a chilling secret I found in the v12 version, when it was still at AMode v1.
First, you go to the elevator just before you fight Giyspot's VERY final form (basically working like Earthbound's Giygas, so to speak, very unique twist on him too with new attacks and EIGHT forms now).
I was in the capsule that Giyspot Seventh-Form trapped me in, and I couldn't figure out how to get out (I later found out I needed to use the supporting character's power), and by chance, I used the Rat Poison that Ector mentioned on -- you won't believe this -- myself.
My character displayed some dying emotes, but rather than the default death or the bloody mess from crits or overkills, it looked like my character ACTUALLY DIED FROM POISON. Then the camera did a dolly zoom on him and the screen became distorted, ending in a white flash.
My character at this point appears fully alive again, albeit having a sad expression on his face, on what appears to be a floating island, containing an exact replica of the house I built. It was on Construct, and every brick was gray. And I mean EVERY loving BRICK. It was like that Monochromity build I made on Badspot's server the other day.
I went inside, and found that all the rooms were locked, except for one, and a mirror was in the foyer, facing away from my character.
Inside the one unlocked room was an armory, containing the Monochrome Arsenal. The weapons in it are loving OVERKILL, with the Monochrome Sword doing more damage than Badspot's Banhammer.
I went to the foyer again and noticed the mirror was facing the door now. I looked in it, and I found myself staring at my character! Not a reflection of my character, but a blockhead looking like THE REAL-LIFE ME! The uncanny Tingalz expression on his face is just stuff-your-pants horrifying if you've chosen the evil campaign, which I tried after, but I chose the good campaign, and the apparent reflection of me had a solemn look.
Anyways, he gave me some chilling dialogue, but he also said that he was supporting me every step of the way; that was pretty nice.
I saw the "Saving..." symbol in the middle of the screen now, and the scene behind it was blurred.
Then the game returned me to the capsule, and my blockhead, now alive and in color, had the Monochrome Arsenal in his inventory.
AND NOTHING ELSE.
After finishing the game, I was quite disturbed by this secret I found, and I emailed Badspot about this.
The next day, I found that the game was now at v13, with Adventure Mode v2. I recieved Badspot's reply in my inbox, stating that he's never even heard of this secret and that I was making stuff up.
I tried the secret again, still using the rat poison like last time, but I found that I was now unable to use the rat poison on myself anywhere, except for a reaction from my character:
"You actually believe I'm going to do that after what happened last time?"
I was disturbed that it said my name, especially for the fact that I did not have that name set anywhere in the game, and upon inspection of that line in the script, it just said "Why would I poison myself?".
I didn't play Adventure Mode until v16.
EDIT: I forgot to mention that when I compared the weapon files in v12 to v13, I found that the Monochrome Arsenal officially did not exist anymore, except for a single, deactivated code snippet in the startup scripts, named "remember.item("mono");". Activating it would cause the game to crash on startup.
