Here is the full list of all 10 Am Madness achievements.
Beat The Madness On Easy Difficulty
Beat The Madness On Normal Difficulty
Beat The Madness On Madness Difficulty
Beat "I'm Only Happy When It Rains"
Cheat The Madness And Live Forever
Beat The Pumpking!
See The True Ending
Discover Ma Sadness
Visit the Secrets Room
Visit the Bugged / History Levels