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