The game takes place in the future where gene modification technology has been widely developed. However, the earth has been destroyed by nuclear weapons in the third world war. Players need to utilize the gene modification technology to combine various body parts from different animals to create their own creature to survive in the barren world. The main mechanic is to collect body parts from different creatures and compose them with the player's own creature. Each body part has its own ability. Players need to think both creatively and strategically to build up a strong creature with powerful combinations of skills to fight against other creatures.