Fans of the original flower defense game were understandably miffed when they discovered the official follow-up would be launching exclusively on iOS, but what really worried folks was the "free-to-play" business. Luckily, Plants Vs. Zombies takes a different approach to in-app purchases than most mobile games.

Rather than alienating fans of the original game by locking content behind pay walls or dumbing-down gameplay for more casual players, Plants Vs. Zombies 2 is only going after players who lack the patience or skill to make it through the game on their own.