Here is the full list of all 14 GetsuFumaDen achievements.
Obtain a third hadouken
Obtain a third demon mask charm
Obtain a second hadouken
Raise your sword power level up to 32
Obtain a second demon mask charm
Obtain a hadouken
Have the god of fortune run out of money
Obtain one demon mask charm
Collect 9,999 money
Collect all defensive items
Collect all offensive items
Improve your sword to the highest quality
Obtain a 1UP item
Defeat your first enemy