Abyss is a side-scrolling adventure arcade platformer. The game takes place in 2034. The planet's natural resources are depleted, and the survival of humanity is under threat. In a desperate attempt to overcome the energy crisis, ASAN creates a biomechanical robot, Nep2no, and sends it to explore the extreme ocean depths in search of a new source of energy. In the end, many years of research are crowned with success; The find is given the code name "Gaia". Your task is to explore the ocean depths in search of stones imbued with the energy of “Gaia”. Under your control, Nep2no will have to fight gravity and the surrounding darkness, having at his disposal only a gradually fading light.