This is the list of achievements from Plants vs. Zombies Online.
Travel Log's Arena Showdown:
Chip The Chippings: Complete a level without spending any wood chippings.
Ticklish: Tickle 10 zombies in a single level.
Quest Complete!: Complete Travel Log's Arena Showdown.
In The Nick Of Time: Plant A Spectator Shroom just before a zombie eats a plant.
Gravitation 3000!: Plant 8 Gravity Nuts in a level.
Lunarity: Unleash the Lunar Gargantuar.
One Giant Leap For Plantkind: Beat the Zombot.
ROCKET CRASH: Destroy all zombies on screen with a single Carrot Rocket Plant Food.
Let There Be Light: Light up the smog with Light Bulb.
Fighting Smoke With Smoke: Plant Food 5 Smoke Stacks in one level.
S.E.E.D. Sapping: Destroy 5 machines with S.E.E.D. in a single level.
Fired: Defeat 10 zombies with one Firnace.
Smokestacked: Unleash the Smokestack Gargantuar!
Worker Safety: Don't let an Oil Spill Zombie explode in a level with Oil Spill Zombies and Blowtorch Zombies.
Once Feared Factory: Reach level 30 in Fear Factory.
Taking Chances: Have 20 Poppys at once.
Mass Production: Have 10 Assembly Vines at once.
He Believed He Could Fly: Knock down a Balloon Zombie Beta with the Duria-pult.
The Future is Now, Thanks to Science: Unlock Dr. Frankenberry.
Not the Boss/Break Time: Complete the Industrial Revolution.