Route Z (iPhone iPod)

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Combos

Smash as many zombies as possible in a row without hitting any obstacles to build combos. Try doing this early in the game before too many obstacles start appearing.

Restore keys

Advance the time on your device by fifty minutes to get a new set of keys. Then, set the time back to its correct value.

Reviving

Do not spend coins to revive unless you are close to completing a difficult mission.

Special zombies

Avoid special zombies, such as those that jump on your car or the ones that are fire.

Upgrades

Start by upgrading your fuel tanks at least two times. However, do not do this until completing the mission that requires you to run out of fuel for a specific number of times. The more fuel you have to use, the more difficult it becomes. The next item to upgrade should be your shield. Increase it to level 5. Upgrade your armor when special zombies begin giving you problems. Do not bother upgrading weapons until you have purchased the second car.