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