Gatekeeper — the heart of the universe has been stolen by powerful forces. You must go to an unknown galaxy, find the heart and bring it back. But your mission is not so simple, the heart was hidden in a quantum cage, the keys to which are kept by the ancient Siren giants. Experience the unexpected thrill of this rogue-lite action. Multiple playable characters with unique abilities to suit your play style. Unlimited skill combinations. Gain experience to improve character skills and use the abilities of found artifacts.