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