Underground World

The Underground World is the first world of The Unlikely Legend of Rusty Pup. It also serves as the game's hub world, with all other worlds branching off of it on The Map of the Mind, as well as all fast-travel Dog Baskets being located within its confines.

The Underground World is loosely based on the London Underground circa 1940.

It contains no particular gimmicks or themes as other worlds do, instead primarily focusing on the basics and more and more difficult puzzles.

Levels

 * Level I-I
 * Level I-II
 * Level I-III
 * Level I-IV
 * Level I-V
 * Level I-VI
 * Level I-VII
 * Level I-VIII
 * Level I-IX
 * Level I-X
 * Level I-XI
 * Level I-XII
 * Level I-XIII
 * Level I-XIV
 * Level I-XV
 * Level I-XVI
 * Level I-XVII
 * Level I-XVIII
 * Level I-XIX
 * Level I-XX
 * Level I-XXI