Here is the full list of all 22 ASTRO AQUA KITTY achievements.
Suppress the infected transporter.
Pulverize the pirate battleship.
Ruin the ancient guardian.
Operate a giant beam device on RUIN.
Vanquish the giant worm.
Shatter the 3 saw machines.
Collect all special gems on HYDROTHERMAL.
Guide the transport walker to the Eastern drill site on HYDROTHERMAL.
Weed out the rogue experiment.
Use a repair cat to fix all damaged doors on SARGASSO.
Make 4 power seeds on SARGASSO.
Fill all your inventory slots.
Equip a skill.
Defeat the infected drill.
Find all walker leg parts on DROPSITE.
Clear the fallen rocks on DROPSITE.
Save at a beacon.
Destroy a crate.
Capture and jail 4 pirates on WRECKS.
Solve both switch puzzles on FORTRESS.
Solve the giant ring puzzle on CATACLYSM.
Annihilate the final opponent.