Here is the full list of all 17 JUNK: The Legend of Junichi Kato achievements.
Completed END 1
Jump 10,000 times
Die 1,000 times
Completed END 2
Completed END 3
Jump 5,000 times
Die 500 times
Completed WORLD 1
Completed WORLD 2
Completed WORLD 3
Completed WORLD 4
Completed WORLD 5
Completed WORLD 6
Get an energy gun
Completed END 1 HARD
Completed END 2 HARD
Completed END 3 HARD