Here is the full list of all 14 BeadsPopper achievements.
Defeated the Slime
Defeated the Kobold
Defeated the Alraune
Defeated the Demon
Defeated the Dragon
Defeated the Fallen Angel
Performed a 2-Chain
Performed a 3-Chain
Performed a 4-Chain
Performed a 5-Chain
Popped 1000 beads
Got a total score of 100000
Performed chains more than 100 times
Cleared Arcade Mode