Here is the full list of all 16 Hentai Roguelike achievements.
Reach the end of GrassLand
Reach the end of FireLand
Reach the end of SoulCave
Unlock the Catacombs
Unlock the NaughtyBook
Kill your First Boss
Unlock the Chest
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