The latest update to the PopCap sequel adds a new, fourth world, with 24 new levels, eight new plants and ten new zombies to play with. The previous three worlds were themed after the past, but the new one is straight out of the future.
In addition this Plants vs. Zombies 2 expansion marks the return of Zen Garden mode from the original PvZ.
The update is available now on iOS and Android. So if you didn't get back into PvZ 2 when they fixed the game's broken economy in December, now there's even more incentive.