PopCap and EA Mobile have released a new update for Plants vs. Zombies 2 today, the first of a two-part update that's located in the Lost City.

Lost City Part 1 is now available in the App Store and Google Play, so download the free update right now and you'll find the new world right away.

In it you'll find 16 new levels, four new plants, and 10 zombies to contend with, including the shovel-wielding Excavator Zombie. There's also a game-changing new mehcanic- the sun-producing Gold Tiles.

Those tiles (hidden under zombies in the screenshot above) are likely the most exciting part of this update. Gold tiles give you sun just for planting a plant on it, and keeping a plant on it will continue to give you more sun over time. This means that you'll be able to grow plants far faster in these levels than in any others, which may be crucial, because they're going to be sending that many more zombies after you.

Here's the full list of additions you'll be able to find-

- 16 New "Golden and Molten Levels"
- 10 New Zombies including specials: Zombug, Excavator, Zombie Jane and Lost Pilot
- 4 New Plants: A.K.E.E., Red Stinger, Endurian and Premium Plant Lava Guava
- Gold Tile Sun Mechanic: Get Sun the first time you plant on a Golden Tile and continue to collect as long as the plant remains on the tile - speeding up the sun economy for faster planting in the level

Plants Vs. Zombies 2 is really one of the finest free-to-play titles around, and PopCap has been great at constantly releasing new free events that expand the game even more. If you haven't played it, there's no time like the present. Pick it up on either iOS or Android