Level select:
Hold Shift while selecting the "New Game" option. This will enable a level select.

Win Level (PC):
Press Ctrl, Alt, and + during gameplay.

Lose Level (PC):
Press Ctrl, Alt, and - during gameplay.

Secret Level #1:
To enable the first secret level, play level 3 - "Down A Broken Path." Go to the top left portion of the map, where you will come across a small lake. On one of the rocks in the middle of the lake lie 3 frogs. Send a dwarf up to blow them to pieces completely. Now walk up to through village and complete the level. This will open up "A Long Awaited Drinking Party."

Secret Level #2:
The second secret level is on "A Murder of Crows," the level where you have to escape from the prison camp. Instead of following the Deciever south after beating Soulblighter follow the archer's advice ("hey, we saw a wagon go north a few days ago") by exiting the level north of Soulblighter's camp. You will go to the secret level, "Limbs, Heads, and Smoking Craters," a MUST if you love blowing things up!

Thanks to Revolution readers Archer, Cianan, Abunai, Kalen Lower, Noah Van Holland, Tashibana, the Rev, and Dan!