Here is the full list of all 13 Apple Slash achievements.
Kill the Blob Mother 3 times.
Beat the game without taking damage.
Departure in under 15 minutes.
Avoid Gumm's trap.
Kill 1000 blobs.
Find the secret concert.
You beat the game!
Defeat the Blob Mother.
No damage during the Blob Mother's fight.
Kill the Blob Mother once.
Acquire the special skills.
Kill 500 blobs.
Kill 250 blobs.