Subatomic Games could sleep on the success of its fantastic tower defense title Fieldrunners [$2.99 / HD], but it isn't. The studio just informed us that a new update for both versions of the game has been submitted to Apple, and it's an update you won't want to miss. New maps, new towers and same-screen multiplayer are being added to the core game with this beast.

But there is a catch. The iPad version is the only one receiving this multiplayer stuff. Specifically, the studio is dropping in two exclusive maps that support both cooperative and versus play. We're not sure how this will work or shake out, but we will undoubtedly give it a go once the update hits.

A total of three new, single-player focused maps are are coming too, each of which adds a new defensive tower to play around with. We've got a short list of these towers and their descriptions for those of you who really care about this stuff.

Plasma Tower � creates combo attacks when used with other plasma towers!
Shotgun Tower � fires a devastating volley of drill bits.
Lava Tower � incinerates all nearby fieldrunners in a giant wave of fire.

While the exclusivity might be a bummer for the iPhone and iPod owners out there, take comfort in the fact that you're probably also getting these three maps and turrets. Subatomic wasn't super clear about this, so we've put one out there to confirm what's in the upcoming iPhone / iPod update. We'll let you know as soon as we know.

There's a chance you could get your hands on this new content within the next four days. There's also a chance you might not see it until December 28. As you may be aware of now, courtesy of the recent App rush, Apple is turning off the lights on the App Store from the 23rd until the 28th. The reason is the season, of course, so don't be too crushed if the certification button-pusher guy can't get around to this content in time. Dude has to see his family too, you know?

UPDATE: The iPad version of the update is out, apparently. And, as you've witness by our edits, we've been seeing conflicting reports about this update. We're checking it out now to confirm what's actually in this thing and will update in a bit.

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