Here is the full list of all 33 TailQuest Defense achievements.
Jump into the bubble
Stop 500 Nands
Stop 1500 Nands
Stop 3000 Nands
Bubble 50 enemies
Bubble your friend
Use a bubble to fly significant distance
Gain 3 stars without selling any tower eight times
Grow and pull 50 plants
Upgrade 50 towers
Find your first secret
Find 30 secrets
Stomp a Nand for the first time
Stomp 20 enemies
Use cannon 30 times
Take an item directly from the Nand
Witness a Nand's attack
Complete Testing Grounds
Resist the Noon attack in Forgotten Garden
Resist the Morning attack on Green Meadows
Resist the Noon attack on Green Meadows
Resist the Morning attack in the Fallen Fortress
Resist the Noon attack in the Fallen Fortress
Resist the Morning attack on the Sea of Wind
Resist the Noon attack on the Sea of Wind
Resist the Morning attack in the Dreamer's Mill
Resist the Noon attack in the Dreamer's Mill
Resist the Morning attack in the Nimber's Kingdom
Defeat the main attack on the Nimber's Kingdom
Save the trapped bee
Resist the Evening attack in Forgotten Garden
Resist the Evening attack on Green Meadows
Resist the Evening attack on Fallen Fortress