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Get your mittens out of storage because the War Mage and Sorceress are headed to protect the ...

NOTICE: This content requires the base game Orcs Must Die! 2 on Steam in order to play.

Get your mittens out of storage because the War Mage and Sorceress are headed to protect the fortresses of the great white north! Defend the new Ice Cavern fortresses against some of the most difficult enemies yet!

Ice Cavern!

Three new levels featuring a new Ice Cavern theme!
Three new Endless Mode conversions!
The chilling new Yeti enemy climbs over barricades and hurls icy shards at you!
The Goblin Sapper wanders the level disabling your well-placed traps.
A new weapon - The Dwarven Missile Launcher rains mana-filled death upon your enemies
A new Trap - The Spike Wall stabs and launches enemies to their deaths
A new Trinket - The Guardian Trinket will revive your fallen Guardians
New character costumes!

NOTICE: This content requires the base game Orcs Must Die! 2 on Steam in order to play.

Windows Minimum Requirements:

OS:Windows XP, Windows Vista, Windows 7
Processor:2GHz Dual Core
Memory:2 GB RAM
Graphics:NVIDIA GeForce 6800 or ATI Radeon x1950 or better with 256MB VRAM
DirectX®:9.0c
Hard Drive:9 GB HD space
Additional:Broadband Internet connection recommended for co-op play.

To activate the Steam key you've received, follow the instructions below;

First up, open the Steam client. (If you don't have it, simply click the "Install Steam" button here => Steam Store )
Sign in to your Steam account. (If you don't have one, click here to create a new one => Steam Account)
Click on the "ADD A GAME" button in the bottom corner of the client.
Then, select "Activate a product on Steam..."
Write down or copy-paste the activation key that you've received from %s in the window.
Your game is now visible in your library! Click on your "Library".
And finally, click on the game and select "Install" to start your download.