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 melee magic 10 times.
Master the explosion magic 10 times.
Dodge 100 times.
Master the curse magic 10 times.
Master the projectile magic 10 times.
Master the areal magic 10 times.
Master the familiar magic 10 times.
Drink 10 muscle potions.
Drink maximum amount of the Beast Potions.
Achieve 10 or more victories in any difficulty.
Drink maximum amount of the Muscle Potions.
Collect 100 flowers.
Drink 10 hips potions.
Drink maximum amount of the Big Breasts Potions.
Drink 10 big breasts potions.
Drink maximum amount of the Small Breasts Potion
Drink maximum amount of the Hips Potions.
Clear Nightmare Wedding difficulty.
Drink maximum amount of the Corruption Potions.
Drink 10 corruption potions.
Clear Hard Wedding difficulty.
Drink 10 beast potions.
Attacked by the Guardian of the seal 10 times.
Drink 10 small breasts potions
You killed 20,000 devils!
Lose 10 ore more times in any difficulty.
Critical attack occurs 1,000 times.
You killed 10,000 devils!
Clear Normal Wedding difficulty.
Achieve one victory in any difficulty
Open 100 pumpkin boxes.
Use 100 skills
Recover health 100 times.
Move 1,000 meters in the game.
Get damages 100 times.
You killed 1,000 devils!
You lost for the first time.