Alyx is a girl with a quest. Her father is sick and she has to find the six power gems to save him.

In this game, you can meet with the characters from the previous games. You will also solve some new puzzles.

Alyx's quest is to find the six power gems to save her father. The way to get the gems is by solving riddles.

This game has a one-of-a-kind gameplay design. It is now more engaging than it was previously. The problems can now be solved by collecting objects and storing them in your inventory. You can also combine and use the items in your inventory to create new ones in order to overcome difficult, brain-teasing obstacles.