Master of Morticulture
Collect all 49 plants (including plants from Crazy Dave's shop).
20 
Popcorn Party
Defeat 2 Gargantuars with Corn Cob missiles in a single level.
15 
Better Off Dead
Get to a streak of 10 in I, Zombie Endless.
15 
China Shop
Get to a streak of 15 in Vasebreaker Endless.
15 
Home Lawn Security
Complete Adventure mode.
15 
Beyond the Grave
Beat all 19 mini-games.
15 
Nom Nom Nom
Stop the horde using only the Sunflower, Wall-Nut, and Chomper on any level.
10 
No Fungus Among Us
Complete a nighttime level without planting any Mushrooms.
10 
Don't Pea in the Pool
Complete a daytime pool level without using peashooters of any kind.
10 
Grounded
Defeat a normal roof level without using any catapult plants.
10 
Good Morning
Complete a daytime level by planting only Mushrooms and Coffee Beans.
10 
Roll Some Heads
Bowl over 5 zombies with a single Wall-Nut.
10 
Crash of the Titan
Defeat your first Gargantuar.
10 
Explodonator
Blast 10 zombies at once with a Cherry Bomb!
10 
Shopaholic
Go trunk diving and spend at least $25,000 on Crazy Dave's Twiddydinkies.
10 
Disco is Undead
Hypnotize the lead dancer zombie.
5 
Soil Your Plants
Plant your first 10 peashooters.
5 
Close Shave
Win any level after all lawnmowers have been used.
5