The Orcs Must Die! Unchained beta marches on, this time with the announcment of a new hero and a new map being added with an 1.1 update scheduled for tomorrow.

The free-to-play followup to Orcs Must Die! and Orcs Must Die! 2 adds Tundra, Oathkeeper of Arctos,  to the mix for players to try out. The grizzly will come with skills such as Wall of Frost and Flash Freeze, and will have his own unique trap called the Saw of Arctos. He will also have two different skins to choose from.

In addition, the new survival battleground map Avalanche will be available. The update also brings UI improvements, balance adjustments to survival mode, as well as new bosses and minions. You can run over to the forums to check out the full patch notes.

If you happen to be going to PAX East this weekend and haven't played the tower defense game before, developer Robot Entertainment will let you try out the game's Survival and Siege modes on the show floor. You can also sign up to join the beta.