If you're a green-skin sympathizer and have refrained from the wanton massacre in Orcs Must Die! 2, Robot Entertainment has some new enemies for you to pulverize while keeping your conscious clear: Elementals. The first Orcs Must Die! 2 booster pack, Fire & Water, brings the hot and cold new creatures to the Action Tower this week.

Fire & Water features Fire Lords, burning Elementals that spawn mini Firelings when destroyed, and Water Elementals, liquid foes who also leave a group of little enemies behind for you to face. Just don't let Waterlings get near puddles, because they'll suck them up and become full-on Water Elementals.

Along with the new creatures, Fire & Water features three new maps, three new Endless mode conversions (co-op and single-player), and a bunch of new traps. Details:
New Levels to Defend - The fight for survival isn't over yet! Battle your way through three exciting new levels in single-player or co-op - Traffic Jammed, Double Decker, and The West Wing.

New Endless Mode Conversions - Think you've mastered Endless Mode? Think again! The Fire & Water booster pack features three new Endless Mode level conversions to hold your ground on - The Library, Double Decker, and The West Wing.

Terrifying New Enemies - Prepare for a whole new challenge when you face off against the harrowing new Fire and Water Elementals!

Exciting New Traps - Add some deadly new defenses to your Spellbook with the Web Spinner, Ceiling Darts, and the Floor Portal!

New Bonus Skull Definition - Can you hold the invading monsters at bay without traps? Prove your mettle by playing exclusively with weapons and you'll add another bonus skull to the pile at the end of each level.
Orcs Must Die! 2: Fire & Water launches on August 29 for $5. Sounds like a worthy addition to a fun, polished Action Tower game.