Here is the full list of all 12 Slay The Zone achievements.
Use the "Best for Last" card.
Buy a new drone.
Get hit by the revenant support shot.
Have more than 3 skills on your drone.
Level Up Liz.
Level Up Catarina.
Unlock Ye-Rin.
Have 1,000,000 souls to spend in the shop.
Kill 10,000 Slimes.
Reach the maximum cadence level.
Reach level 5 of a golden card.
Kill the boss.