"oh, this?" Sans tapped the rubber ducky. It let out a low, distorted sound, like a heavy bass note played through a broken speaker. HONK. "just a little something i picked up. apparently, in the 'Quack Prep' universe, this is the height of tactical gear. adds +5 to charisma. subtracts -10 from dignity."

There are community discussions regarding early, unused "quack" voice lines found within Undertale's program code, which some fans link to the development of characters like Undyne or Papyrus.

One of the most intriguing aspects of Quack Prep is its use of "prep points," a system that allows players to influence their character's abilities and interactions. By accumulating prep points through completing tasks and making certain choices, players can unlock new dialogue options, abilities, and even alternate story paths. This system adds a layer of depth to the gameplay, making each playthrough feel unique.

Quack Prep Subtitle: An Undertale AU Draft

Here’s a raw draft written in the style of Undertale battle text / fanfiction opening:

Sans sighed, the lights in his eye sockets flickering out, leaving only the reflection of the yellow raincoat. He raised a hand, the rubber ducky at his chest vibrating with an ominous, low-frequency hum.