Claire and Moira's journey leads them to the Overseer's Tower, a central hub of the island's operations. This area is heavily guarded by a new, tougher variant of the Afflicted, often armored or wielding crude weapons. You'll also encounter the Revenant, a grotesque creature made of stitched-together body parts. Revenants have a glowing weak point, usually on their torso or back, which Moira's flashlight can reveal. Aim for this weak point with Claire's weapons for maximum damage.
The tower features several multi-layered puzzles, often involving activating multiple switches or finding specific items to unlock doors. One significant puzzle requires finding three Cogwheels to repair a large clock mechanism, which in turn opens a path forward. These cogwheels are typically hidden in side rooms or behind destructible barriers. Moira's flashlight is crucial for finding hidden passages and items. Expect intense firefights in confined spaces. Resource management is key; use your sub-weapons and crafting wisely. The climax of this section involves a confrontation with a powerful enemy, leading to a critical story revelation.