Robot Entertainment announces Lost Adventures, a new DLC pack planned for release on Tuesday for Orcs Must Die!, their action/strategy hybrid. The pack will include five new fortresses, and will be offer n Steam at a special introductory price of $2.99. Here are the details:

• Five New Fortresses – Repel the orc onslaught in four completely new fortresses plus a reverse version of The Tower where your enemies have the high ground! Each fortress can be played on Apprentice, War Mage, or Nightmare difficulty.
• Two New Enemies – Fear the icy breath of the Frost Bat, and beware the draining magical attack of the Cyclops Mage!
• New Leaderboards – Challenge your friends for the highest score on leaderboards for each of the five new levels.
• New skull rewards – Earn up to fifty additional skulls to further upgrade your arsenal of traps!
• A New Bonus Defense! - Place the Mana Well in strategic locations around a fortress for a burst of magical energy at just the right moment.