Here is the full list of all 13 Hikikomori No Chuunibyou achievements.
Complete the fourth level without dying.
Complete the fifth level without dying.
Complete the third level without dying.
Complete the first level without dying.
Complete the second level without dying.
Complete the fifth level.
Complete the fourth level.
Complete the third level.
Distribute a flyer while running an errand for the pharmacist.
Complete the second level.
Finish the tutorial after dying at least once.
Complete the first level.
Finish the tutorial (without dying).