Here is the full list of all 35 Akane achievements.
Unlock all cigarettes
Unlock the eighth cigarette
Unlock the eleventh gadget
Unlock all gadgets
Unlock the fourth shoes
Unlock all shoes
Unlock the tenth gadget
Unlock the ninth gadget
Unlock the eighth gadget
Unlock the sixth gun
Unlock all guns
Unlock the third shoe
Unlock the seventh gadget
Unlock the fifth gun
Unlock the seventh cigarette
Unlock the sixth gadget
Unlock the sixth cigarette
Unlock the second shoe
Unlock the fifth gadget
Unlock the fourth gun
Unlock the fifth cigarette
Finish the Tutorial
Unlock the fourth gadget
Unlock the fourth cigarette
Unlock the third gadget
Unlock the third Katana
Unlock all katanas
Unlock the third gun
Unlock the second gadget
Unlock the third cigarette
Unlock the second cigarette
Unlock the second gun
Unlock the second katana
Unlock the first gadget