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