Elder-Geek: The people over at PopCap Games seem to know what the human brain craves. They have well known titles such as Bejeweled, Feeding Frenzy, and Peggle under their belt and are arguably one of the most successful casual game developers today. [Insert Nintendo joke here]. One of their more recent titles is Plants vs. Zombies and it has taken the gaming industry by storm and is now playable on the PC, Mac, iOS, XBOX Live Arcade and most recently, the Nintendo DS. Even if you have already purchased Plants vs. Zombies for your PC or Mac, the DS version is a great buy if you want to play on the go.