Here is the full list of all 30 RESTLESS SOUL achievements.
Defeat DR. KRULL
Retrieve the first key (again).
Visit all Mysterious Buildings in numerical order
Find every letter in the AFTERLIFE.
Find all the letters in Skull Cave
Find all the letters in Beach Town.
Find all the letters in Stone Town.
You rescued all of the little bros!
Complete Beach Tower.
Deliver all packages in Beach Town.
Survive the shootout in Western Tower.
Rustle up all the letters in Western Town.
Return all the lost coins in the Hedge Maze.
Survive the Neo Tower Convention.
Find all the letters in Neo Town.
Help all of the customers get their products.
Take the Power Switch Back.
Complete Stone Tower.
Get discovered by the Easter Egg.
Complete Pyramid Tower.
Find all the letters in Pyramid Town.
Complete the Karma Hotel Puzzles.
Find all of the letters in Dark Town.
Complete Dark Tower.
Find all of the letters in Waterfall Town.
Complete Waterfall Tower.
Find all of the letters in Alpha Town.
Complete Alpha Tower.
Destroy an achievement.
Listen to Woof's Tutorial.