Chapter 10, titled "Parallel Paths," of Resonance: A Plague Tale Legacy sees Sophia and Faro joining forces to confront the island's looming threat. After their reunion in Chapter 9, the duo aims to quell the beast that lies beneath the island, combining Faro's knowledge with Sophia's vision.

Navigating the Mountain Temple

The chapter begins with Sophia following Faro as they work towards reaching the island's sources of light, crucial for subduing the beast. Their objective leads them to a mountain temple entrance, where they encounter Irene and a group of soldiers, revealing Irene as the traitor.

Following their escape, Sophia and Faro must find an alternate route into the temple, as depicted in Sophia's journal. This involves deciphering symbols and arrows within her book to navigate a cave maze. Upon reaching the temple entrance, a puzzle involving the Sphere's "Reveal Light" and "Splitting Light" abilities must be solved to open the main doors. This puzzle requires aligning light beams with specific gemstones on the door, using three pedestals and referencing symbols associated with a sword, bow, and spear.

Daedalus's Workshop and New Abilities

Inside the mountain temple, Sophia and Faro explore Daedalus's workshop. Here, Sophia gains a vision of Theseus and Ariadne, and a training sequence ensues where Sophia, playing as Theseus, learns to use lanterns to quell the beast and progresses through a trial. This trial ultimately grants Sophia the "Light Concentrate" ability for her Sphere, allowing her to target the beast with a concentrated beam.

Returning to playing as Sophia, she must now exit Daedalus's workshop. This involves using the new Light Concentrate ability to clear petrified ash blocking the path. Faro assists by using a lens to dispel ash that obstructs Sophia's progress, particularly as she navigates sections requiring grapnel hooks.

Acquiring Upgrades and Advancing

Sophia then retrieves the Light Concentrate ability upgrade. Further progress requires using this new ability on petrified ash and navigating more environmental obstacles with Faro's assistance. This includes a sequence where Faro directs light through a reflector to clear ash, and Sophia must use the Grapnel hook to traverse broken paths. The chapter concludes as Sophia and Faro enter Chapter 11, "Patera," after clearing a doorway with the Light Concentrate ability and ascending via an elevator.

This walkthrough covers the main objectives of Chapter 10, "Parallel Paths," guiding players through the challenges of the mountain temple, the acquisition of new abilities, and the continuing narrative of Sophia and Faro's quest.