Here is the full list of all 30 Aquillanto achievements.
Complete the tutorial level.
Complete the first proper level.
Win 10 missions... it's not impossible.
Complete a level (excluding tutorial) without losing any stamina.
Complete a level (excluding tutorial) without shooting any ink.
Find three crowns on a level.
Discover ten secrets on a single level.
Kill five monsters using a single mega ink power-up.
Touch a monster with the shield power-up active.
Slay, splat and zap 100 wasps.
Smash, bash and splash 100 angry stumps.
Defeat the flaming end of World 1 boss stump.
Slay 5 underwater creatures on a single breath of air.
Slay 5 monsters while a single slow-time power-up is active.
Destroy 100 chain warriors - turn them to rust.
Blast 100 brown bats out of the air.
Defeat the evil Cyrus and his dastardly machine at the end of World 2.
Collect five extra lives on a single level.
Mush and mash 100 mummies.
Splat 100 World 3 warty spiders.
Destroy Kanatoom's evil spirit encased in the giant mummy.
Complete all three missions for levels 1 to 15 in World 1.
Complete all three missions for levels 1 to 15 in World 2.
Complete all three missions for levels 1 to 10 in World 3.
Obtain the Gold Pen.