Though it has been offered at a reduced price multiple times, the app has never before been available for free, until today, because of Apple's App of the Week promotion.
Plants vs. Zombies is a lane defense game where players use a variety of defensive plants to fight off waves of attacking zombies. Thanks to its cartoonish graphics and strategic gameplay, Plants vs. Zombies is a game that is popular with both serious and casual gamers.
Plants vs. Zombies is designed for the iPhone and can be downloaded from the App Store at no cost. [Direct Link]
Plants vs. Zombies HD is the version that has been designed for the iPad, and it is also free. [Direct Link]
Article Link: Popcap's 'Plants vs. Zombies' for iPhone and iPad Available for Free