Here is the full list of all 30 Total Madness achievements.
Killed your first enemy
killed 50 enemies
killed 100 enemies
killed 200 enemies
killed 300 enemies
killed 400 enemies
killed 500 enemies
killed 600 enemies
killed 700 enemies
killed 1000 enemies
Passed level 1
Passed level 2
Passed level 3
Passed level 4
Passed level 5
Passed level 6
Passed level 7
Passed level 8
Passed level 9
Completed Madness Mode - Finished the game
Found the secret Panda 1
Found the secret Panda 2
Found the secret Panda 3
Reach level rank 2
Reach level rank 5
Reach level rank 10
Reach level rank 20
Reach level rank 30
Get a huge combo kill!
Get a highscore of 9000+