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