The download button opens the iTunes App Store, where you
may continue the download process. You must have iTunes installed with an
active iTunes account in order to download and install the software. This
download may not be available in some countries.
From Not Doppler:
Drive your way through a zombie apocalypse. Are you ready to drive for your life? The hit online game has been revamped and re-engineered for the App Store, bigger and better than ever before. With only a run-down car and a small amount of cash at your disposal, your mission soon becomes clear to drive through hordes of zombies in order to escape alive. Earn to Die sees you not only driving your way through hordes of zombies, but allows you to earn cash to upgrade, unlock and customise new vehicles. Is your vehicle not strong enough? Why not add a gun, or boosters, or even a spiked frame?