Full list of all 18 UltraGoodness 2 achievements worth 1,000 gamerscore. It takes around 0.5-1 hour to unlock all of the achievements on Xbox One.
Complete level 7.
Kill 750 enemies.
Complete level 6.
Complete level 5.
Complete level 4.
Kill 500 enemies.
Preform an UltraViolence kill combo.
Kill 250 enemies.
Complete level 3.
Buy any cat upgrade.
Kill 100 enemies.
Complete level 2.
Kill 50 enemies.
Kill 25 enemies.
Complete level 1.
Preform a Brutal kill combos.
Preform a Cruel kill combo.
Preform a Deadly kill combo.