sukhbir Toggles the zombie's call for brains-sound.
daisies Zombies leave small daisies behind when killed.
Mustache Zombies Now Have Mustaches.
One time free fertilizer. The first time Crazy Dave allows you to start growing your plants, you'll start off with two plants; upon feeding them enough water, Crazy Dave will say they need more fertilizer. Instead of buying the fertilizer, simply hit back. You won't get charged for the price of the fertilizer!
When you complete these, they unlock a trophy for the main menu.
Gold Trophy Get all trophies in Mini-Games, Puzzle, and Survival modes.