Complete solution with answer and video walkthrough
While Alyx was fighting Loki, the others were busy with his minions
Tap on Smith to shoot. The big minion must be defeated with a cannon. Drag the kettle and wheel together. Drag a piece of pipe to complete the cannon. Use that big black ball as a cannonball.

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.

Gundolf Puzzle. Fix the image

They must protect Alyx while she charges up the Horn

The Horn is charged up, time to attack

Alyx must overcome Loki's power

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

Loki is unleashing the whole power of the Gems