Papyrus

This is a difficulty in The Undertale Chain. This difficulty has different stages to it, each being harder than the one before it. A tower of this difficulty can use multiple different stages of Papyrus in it, or it can just use one, which will change where it is on the Papyrus difficulty. Because of the way that the stages are spread out in difficulty, this is unclassified.

Normal Papyrus
This is the stage for Papyrus in his normal form. He can be found in Snowdin throughout the game of Undertale. He is a happy, upbeat, nice, and strange guy. He loves to create puzzles, so something of this difficulty is mainly just a puzzle themed tower, but the puzzles have random difficulties, but most of the time they are just a pushover. They can include having to walk on a certain path, walking right by the puzzle, walking right by the puzzle again, turning x's into o's and many other fun activities.

Physics Breaking Papyrus
This is when Papyrus uses his powers to break physics. Pretty much, you have to throw all logic out the window for this, and try to figure out what the Roblox physics is for certain parts of this. It's still puzzle themed, but you have to solve the puzzles by using the new way that physics works to your advantage.

Battle Papyrus
This is Papyrus during a battle. It's like Physics Breaking Papyrus, but with Undertale Papyrus bossfights scattered throughout the tower, and you have finish them in different ways, by killing him, letting him spare you, or you sparing him.

Special Attack Papyrus
This is the hardest I mean easiest Papyrus stage, because you just see the Annoying Dog bring the Winpad to you, so you don't really have to do much.

True Power Papryrus
Papyrus is using his true power on you now. This means that it's like the Battle Papyrus stage, except that Papyrus is throwing bones that act like normal Kill Bricks at you the entire time and shooting you with Gaster Blasters that do 1 damage. A Gaster Blaster for those living under a rock is a giant skull thing that shoots a death laser.