Fire and Water is the first DLC expansion for Orcs Must Die! 2. It was released on 29th August 2012.
Fire and Water provides three new levels that can be played either solo or co-op: Traffic Jammed, Double Decker, and The West Wing. There are also three Endless Mode conversions included for the levels The Library, The Crossing, and The West Wing.
The pack also brings new enemies, in the form of Fire and Water Lords and Elementals. These new foes won’t be easy to beat, because killing them just produces more problems. Fire Lords and Elementals will become Firelings when destroyed and Firelings explode when they get near you. Water Lords and Elementals leave behind a puddle corpse that Waterlings can absorb, turning them into Water Elementals.
Fortunately, there are also three new traps to help your defense. The Web Spinner is a wall trap that produces webs to slow invading forces' assault. Dart Spitters drop from the ceiling and spray poison darts in all directions. Finally, the Floor Portal can be an excellent last line of defense as it will transport any foe that steps on it back to the beginning of the level.
Topping off the package is a new bonus skull, gained by not using any traps in the successful completion of a level.
Fire & Water costs $4.99 on Steam.