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