Description Quantum Theory, the game has a dark Sci-fi theme. Players take control of Sid, a "dark hero" who wields a massive gun, and Filena, a rebellious heroine who wields a weapon that can change between a sword and gun. Both characters are attempting to climb a massive tower for their own specific reasons. Sid wants to destroy the tower. Filena wants to meet her father, who is presumably at the top of the tower.