Cat Hero: Idle RPG is an iPhone game developed by Game Duo Co.Ltd. It is a free game in the Games category. In this game, players help a cat hero protect their master from haunting monsters in their dreams.

The gameplay revolves around merging fish to create stronger fish missiles. By merging fish of the same shape, players can create larger and more powerful missiles. The more fish they merge, the stronger their missiles become. Additionally, the magic tank ensures that players never run out of fish.

Players can also meet and recruit various friends and companions on their journey, such as Sausage, Onigiri, Chicken, Pudding, and more. Exploring different dreamlands, like Rock Candy Ville and Fish Bone Ruins, allows players to find valuable items to aid them in their quest.

The ultimate challenge comes in the form of the Giant Nightmare, which takes the shape of the dreamer's greatest fear. However, with a strong fish and reliable companions, players can conquer the Giant Nightmare and bring peace to their master's dreams.

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