Simmons Family Ring

2-1, crypt: back in the body-bag chamber, pull the (now powered) lever: the gate opens and 3 armoured zombies drop in. That room's floor is a trapdoor: pin them to the far wall with Crossbow bolts (normal arrows) so you can cross to the purple chest.

Place it on the plaque on the far wall of the gallows room: it opens the purple door. Story Intersection: during the Deborah fight (Ada Chapter 2, 2-2 Altar Corridor = Leon Chapter 2, 2-7) Ada hands it to Leon, and in Leon Chapter 3 (3-1 Altar Corridor) Leon uses it on the serpent door.

Medals: "Acquired Simmons' ring" and "Gave Simmons' ring to Leon". In Leon Chapter 3, after using the ring, hold out against the waves until the door unlocks itself: the crank by the door fires bursts of flame across the bridge the zombies come over.