A free program for Android, by AGaming.

The Sun: Key of Heaven (Demo) is an action game with RPG elements that takes place in a post-apocalyptic world. It tells a story of a main character who is a Chosen of a community that is trying to survive in a world full of dangers and challenges. In order to survive and protect their community from threats, they must explore and build their own city. They also need to find food, water, and other resources to survive. The story is about the struggle of the main character to survive and protect his people.

Gameplay

The Sun: Key of Heaven (Demo) is a first-person shooter with RPG elements. You will have to complete quests, play in multiplayer mode, fight against other players, and fight against various enemies and bosses. The game has hundreds of quests that will help you to survive and thrive in the post-apocalyptic world. 

The gameplay is based on action-packed scenes. Each quest will have a boss battle that will test your skills.