Welcome to the forum coolsti

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Can someone tell me if my game is going completely wrong? Or are these bugs? Or do I not understand something.

Your game is not going completely wrong. Don't worry everything is normal.

First you have to finish the quest with the necromancer.
Then he will teleport you outside of the cave.
At this moment you will be able to explore the second act maps and to finish all your quests in the imp village.

Barta