Obtaining the Green Leech Charm | Laboratory Walkthrough Resident Evil Zero HD Guide
Last update: 02 February 2017
Continue playing as Billy, who should be in the library on level B2 (M4,8) and he should already have Bl. Leech Charm in his inventory. Soon, you will have to fight a leech zombie, so make sure that Billy is well prepared (If need be, Rebecca can send the grenade launcher down). The fight will take place after leaving the library (M4,7). The zombie may be standing next to the door or hide behind the corner on the left. If you don't have ammo for your good weapons, you can try to go past the monster, but it will be quite difficult, because the corridor is not very wide.
Start searching the part of the corridor that was unlocked after pressing the button on the higher level. You can use Bl. Leech Charm to open the blue door located at the end of the corridor (open the inventory and select Use). In the new room (M4,14), search the left wall thoroughly. You will find Input Reg. Coil and an Old Photograph hidden behind it.
Choose the door leading to the southern room (M4,15) and kill all the zombies inside (at least one of them is playing dead). Approach the large statue and take Gr. Leech Charm. With the artifact, you can go back to the library (M4,8), place it in the service lift and send up (M4,13). Switch to Rebecca and collect the item. You can use the green charm in this room, to open the southern door (M4,16).