That’s right. You can claim a copy of Dungeons II on Steam for FREE. All you need to do is go here. Do note, however, that you will need a Humble Bundle account.
As to the game itself? I’ve yet to play it (busy busy). That said, judging from the trailer and other videos, it looks pretty rad. Who doesn’t love playing the bad guy and trampling all hope out of the peasantry of a fantasy land? A stick in the mud, that’s who. Realistically only bad guys get to use awesome stuff like Force Lightning and have the best image songs.