Complete solution with answer and video walkthrough
Alyx must overcome Loki's power
Use the yellow balls to overcome the green ones. Drag the yellow balls to surround the green ball on top left. Use the balls to overcome the greens on the bottom. Finally use all of the balls to surround the big green ball.

This level challenges your problem-solving skills with a unique puzzle. Take your time to observe all elements on the screen. Sometimes the solution requires thinking outside the box or interacting with objects in unexpected ways. If you're stuck, try different approaches and don't be afraid to experiment with the interface.

They are surrounded

Gundolf Puzzle. Fix the image

They must protect Alyx while she charges up the Horn

The Horn is charged up, time to attack

While Alyx was fighting Loki, the others were busy with his minions

Gundolf Puzzle. Put the correct alchemy formulas

Thor got his hammer back, time to strike lightning

Loki is running out of power, Alyx must stand a bit more