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