Grow the Tree of Wisdom to at least 100 feet
Survive 40 waves of pure zombie ferocity
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
Go on a 5 game winning streak in VS. mode
Complete adventure mode
Defeat your first Gargantuar
Survive the zombie onslaught after all lawnmowers have been used
Blast 10 zombies at once with a Cherry Bomb!
Stop the horde using only the Sunflower, Wall-Nut, and Chomper on any level
Plant your first 10 peashooters