Here is the full list of all 38 Wedding Witch achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
Achieve a victory with less than 10 damages dealt to the witch.
Master the projectile magic 10 times.
Master the explosion magic 10 times.
Master the curse magic 10 times.
Achieve 10 or more victories in any difficulty.
Master the familiar magic 10 times.
Drink 10 big breasts potions.
Drink 10 small breasts potions
Master the areal magic 10 times.
Drink maximum amount of the Muscle Potions.
Collect 100 flowers.
Drink maximum amount of the Hips Potions.
Drink maximum amount of the Beast Potions.
Drink 10 beast potions.
Drink 10 hips potions.
Dodge 100 times.
Lose 10 ore more times in any difficulty.
Master the melee magic 10 times.
Drink 10 muscle potions.
Drink maximum amount of the Corruption Potions.
Drink 10 corruption potions.
Clear Nightmare Wedding difficulty.
Use 100 skills
Drink maximum amount of the Big Breasts Potions.
You killed 20,000 devils!
Clear Hard Wedding difficulty.
Drink maximum amount of the Small Breasts Potion
Critical attack occurs 1,000 times.
Recover health 100 times.
You killed 10,000 devils!
Open 100 pumpkin boxes.
Attacked by the Guardian of the seal 10 times.
Move 1,000 meters in the game.
Get damages 100 times.
Clear Normal Wedding difficulty.
Achieve one victory in any difficulty
You killed 1,000 devils!
You lost for the first time.