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