Here is the full list of all 24 AQUA KITTY UDX achievements.
Beat the Giant Mag-Mine Boss
Destroy 80 Paleofish!
Destroy 200 Jellygrabs!
Destroy 100 Angelfishies!
Destroy 180 Puffabooms!
Destroy 250 Craboids!
Destroy 50 Squadronfish!
Rescue 100 Miners from being abduted.
Reach a maximum chain bonus of 99.
Have all three directional pickups active at once.
Trigger 3 bombs in under 2 seconds.
Go crazy and destroy 20 enemies in under 2 seconds.
Complete level 4 in classic mode without turning.
Save all the mining kittens in Classic mode normal difficulty.
Buy all items in Arcade mode in one playthrough.
Beat the Giant Crab Boss.
Beat the Giant Angelfishy Boss
Beat the Giant Nautilus Boss
Beat the dreadnought Cattrox.
Beath the dreadnought Haddokah.
Beat the dreadnought Fissionchips.
Beat the dreadnought Ginormalous.
Collect a kitten in Dreadnough mode whilst directional weapons are active.
Reach wave 10 of Infinite Espresso in normal difficulty.