Here is the full list of all 33 Monster Girl Incursion achievements.
push stamina to 200
get 1000 monstercores
win the game without using the bed
win the game without selling medals
defeat all bosses without wearing armor
win the game without buying anything
complete the game to 100%
complete the game to 200%
buy 80 apples
defeat bunny (hard) without getting hit
defeat goblin (hard) without getting hit
defeat slime (hard) without getting hit
defeat ogre without getting hit
defeat harpy (hard) without getting hit
defeat potmimic (hard) without getting hit
defeat thief (hard) without getting hit
defeat giant without getting hit
defeat elf (hard) without getting hit
defeat dryad (hard) without getting hit
defeat pixies (hard) without getting hit
defeat appletree without getting hit
defeat mermaid (hard) without getting hit
defeat lizard (hard) without getting hit
defeat wisp (hard) without getting hit
defeat witch without getting hit
defeat ghoul (hard) without getting hit
defeat necromancer (hard) without getting hit
defeat spider (hard) without getting hit
defeat vampire without getting hit
defeat hellhound (hard) without getting hit
defeat succubus (hard) without getting hit
defeat fiend (hard) without getting hit
defeat dragon without getting hit