"Zombies Community Edition" by PopCap (PopCap Games) and Renren co-development of a social class casual games. Relative to the stand-alone version, the Community Edition has a more exciting competitive play, the more interesting zombies and props. The most important thing is the game based on the SNS community, so that interaction between players greatly enhanced.
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I found some gameplay, there appears to be two new plants. (The titles say "Online" but it is...