Here is the full list of all 47 NecroBouncer achievements.
Finish 1 run.
Defeat 1st boss
Defeat 2nd boss
Defeat 3rd boss
Defeat 4th boss
Win with the 1st outfit
Win with the 2nd outfit
Win with the 3rd outfit
Kill 10 minions with traps
Collect all 6 upgrade relics for Rolling Emerald
Collect all 6 upgrade relics for Beam Crystal
Collect all 6 upgrade relics for Blue Gem
Collect all 6 upgrade relics for Volatile Amethyst
Kill 500 minions
Kill 1000 minions
Spend 1000 energy
Collect 2000 coins
Carry 1000 coins at once
Kill 10 treasure goblins
Buy everything in bar
Finish the tutorial
Complete all 4 stages in a relic hunt
Complete all 4 stages in a relic hunt without taking damage
Defeat Scarecrow without taking damage
Defeat the Shrine without taking damage
Defeat Death Knight without taking damage
Defeat the final boss without taking damage
Kill 200 minions with ranged attacks
Kill 200 minions with abilities
Kill 10000 minions
Defeat the game on difficulty of 20
Defeat the game on difficulty of 50
Defeat the game on difficulty of 90
Defeat the game on difficulty of 140
Defeat the game on difficulty of 200
Defeat the game on difficulty of 300
Defeat the game on difficulty of -400
Clear hard Crystals or Pillars room before the first enemies spawn
Reach day 666
Collect 100 relics
Collect 250 relics
Collect 1474 relics
Collect 100 cursed relics
Unlock all relics
Equip all 4 power gems at the same time
Collect the Empty Bag
Have 10 cursed relics at the same time