The Arcanists made him smart. The Dungeon made him deadly. Flushed into the sewers as a failed experiment, R-1T awakes with a System and a hunger that cannot be sated. In a world of psychic bugs and toxic slugs, he is the ultimate underdog. But in the Sewer Dungeon, you are what you eat. Literally. Follow R-1T as he climbs from a fragile Level 1 rodent to a terrifying force of nature. He must navigate a treacherous labyrinth, outsmart Hive minds, and unlock the secrets of his own mutated biology.