Question: Can we continue playing after we beat the main storyline? Will there be new content unlocked after you beat it?
Answer: Yes to both questions. You can continue to play after you beat the main storyline, and you get new content to explore and new enemies to fight. Here is the quote from Carsten:
"After you're through with the main story you get:
1. New battles
2. New enemies
3. New NPCs
4. New quests
5. New hidden secrets
The difficulty of the game will increase rapidly after the main story. You will need some time to solve all quests, beat all enemies and find all secrets. Maybe nobody will find everything we hide in the wastelands."\
I knew you could continue playing but not the specifics of new content - thanks. This remains one of my most-anticipated titles, although it's frustrating without any publishing deal. The German launch will be revealing - both for the reviews/feedback and because they'll turn their attention to an english launch.