Easy experience...
	Escape invasions...
	Fast growing...
	Game Center achievements...
	Getting brains...

Plow empty land to gain 1 experience point but lose 10 coins. Sell the plowed land to get the 10 coins back while keeping the experience. This can be repeated as many times as desired, but is less effective in later levels because of the low amount of experience gained.

If you start to lose when invading someone, press Home to escape. You will get all your zombies back when the game is resumed.

After planting something that takes a long time to grow (for example, two hours for a tomato or two days for a potato), exit the game. Go to the system settings and advance the time for the amount needed for the plant to grow. Note: This may kill any fast crops if done too long.

Complete the following tasks to unlock Apple Game Center achievements.

Achievement	How to unlock
A Close Fight	Win an invasion with 1 zombie left.
A Grave New World	Collect the Blue Grave and Red Grave.
com.zombiefarm.f..	Win an invasion with no zombie casualties.
Do or Die	Win an invasion after the timer expires.
Easter Island	Collect all Monoliths.
Green Thumb	Have your garden zombie fertilize 100 times.
Grounds Keeper	Unlock all ground upgrades in the market.
Hall of Banners	Collect each enemy's banner.
Master's Degree	All active zombies are Masters.
Minute Man	Win an invasion in under 1 minute.
Mutant Parade	Unlock all zombie mutations.
Ready for Farmin'	Complete the farming tutorial.
Ready for Fightin'	Complete the invasion tutorial.
Rest In Peace	Unlock the Mausoleum.
So Vivid	Get a Double Rainbow from enemy loot.
Storage Galore	Fully upgrade your storage building.
The Biggest Loser	Lose 10 invasions.
The Corporate Banner	Collect CorporateVille's rare banner.
The Farmer's Banner	Collect Old McDonnell's rare banner.
The Ninja's Banner	Collect The Ninja's rare banner.
The Pirate's Banner	Collect The Pirate's rare banner.
The Rot Pack	Win an invasion with all 6 zombie types present.
Veteran's Day	All active zombies are Veterans.
What's Up Doc	Harvest 1000 carrots.
Zombie Apocalypse	Win an invasion 50 times.
Zombie Domination	Win an invasion with 2 or less zombie casualties.
Zombie Invader	Win an invasion 10 times.
Zombie Ravager	Win an invasion 25 times.
Zombie Survivor	Have the same zombie partcipate in 10 invasions.
Zombie's Got Talent	Collect all zombie abilities.

Exit the game, then go to "Settings", then "General", then "Date And Time". Advance one day, then resume the game and check your daily surprise. You will not always get a brain, you will most likely get gold. The amount of gold depends on how many of your friends also have Zombie Farm.