It seems like Marketing 101: “Lots of guys like zombies. Lots of girls like plants. Some people like zombies and plants. So how about a game where plants fight zombies?” PopCap has a sense of humor, and knows casual games as well or better than anyone, so it was a fair bet that it could figure out a way to develop a funny, accessible title that combined these concepts together. That’s what Plants vs. Zombies ($20, Mac/PC) is:…
