Survive 40 waves of pure zombie ferocity
Grow the Tree of Wisdom to at least 100 feet
Collect all 49 plants in the game
Go trunk diving and spend at least $25,000 on Crazy Dave's Twiddydinkies
Bowl a winner with a friend in Co-Op Wall-Nut Bowling
Win any level after all 5 lawnmowers have been used
Complete adventure mode
Defeat your first Gargantuar
Stop the horde using only the Sunflower, Wallnut, and Chomper on any level
Blast 10 zombies at once with a Cherry Bomb!
Go on a 5 game winning streak in VS. mode
Plant your first 10 peashooters