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