Here is the full list of all 36 Hentai Jigsaw Puzzle 2 achievements.
Complete level 1 in easy mode
Complete level 2 in easy mode
Complete level 3 in easy mode
Complete level 4 in easy mode
Complete level 5 in easy mode
Complete level 6 in easy mode
Complete level 7 in easy mode
Complete level 8 in easy mode
Complete level 9 in easy mode
Complete level 10 in easy mode
Complete level 11 in easy mode
Complete level 12 in easy mode
Complete level 1 in normal mode
Complete level 2 in normal mode
Complete level 3 in normal mode
Complete Normal Level 4
Complete level 5 in normal mode
Complete level 6 in normal mode
Complete level 7 in normal mode
Complete level 8 in normal mode
Complete level 9 in normal mode
Complete level 10 in normal mode
Complete level 11 in normal mode
Complete level 12 in normal mode
Complete level 1 in hard mode
NEW_ACHIEVEMENT_DESC_1_25
Complete level 3 in hard mode
Complete level 4 in hard mode
Complete level 5 in hard mode
Complete level 6 in hard mode
Complete level 7 in hard mode
Complete level 8 in hard mode
Complete level 9 in hard mode
Complete level 10 in hard mode
NEW_ACHIEVEMENT_DESC_2_2
Complete level 12 in hard mode