What is Plants Vs Zombies?
Plants vs Zombies is a tower defense game made by PopCap Games and was conceptualized by George Fan. While there are many tower defense games on the market now, Plants vs Zombies takes a significantly different approach; nearly every tower defense game revoles around planting down weak defensive units to create a mazing path for enemies to walk through while putting a few powerful defensive structures down and upgrading them to maximize their damage output. Another technique common in tower defense games is "juggling" or creating a long maze and then blocking off the end of the maze while opening up a pathway near the beginning of the maze once the enemies are nearly all the way through the maze. This causes the enemies to reverse direction to have to get through the level and gives the defensive towers more time to deal damage to the enemies.
Plants vs Zombies doesn't deal with any of this... the process is very straightforward. In Plants vs Zombies, there are several lanes of lawn which are divided up into squares. A plant can be planted in any square and enemies (zombies) enter from the right, walking left. Zombies almost never switch lanes and plants are never rearranged to create mazes or juggle enemies. This makes for an easier-to-understand playing experience, but the game is still deep with plenty of gameplay and difficulty for hard-core players.