Here is the full list of all 16 Hentai Roguelike achievements.
Unlock the NaughtyBook
Unlock Magic Staff
Unlock the Catacombs
Meet the Coliseum Challenge
Reach the end of GrassLand
Unlock the Chest
Reach the end of FireLand
Reach the end of SoulCave
Kill your First Boss
Rock Stage 1
Rock Stage 2
Rock Stage 3
Rock Stage 4
Rock Stage 5
Rock Stage 6
Rock Stage 7