Exploring the R.P.D.

Push down the corridor past a dead officer (Handgun ammo) and dodge the crows breaking through the windows. Take the first door out to an exterior stairwell (three Green Herbs), then head down into the East Office.

Clear the four zombies here and grab the Valve Handle from a shelf. The small open office's safe uses the same combination Claire found:

It holds Shotgun ammo and the R.P.D. Map; there's also Handgun ammo on the desk and two Green Herbs behind it. Head back up to the rooftop and use the Valve Handle on the water system to douse the crashed helicopter's fire (Handgun ammo hidden inside once it's out).

Back at the crow-filled corridor, a cutscene shows a helicopter dropping a container onto the station holding a strange creature. The ceiling collapses, sealing off the rooftop route, and a towering Tyrant T-103 appears ahead.

Exit through the door opposite the stairwell into a hallway with two Lickers — avoid them for now and duck into the secretary's office (storage chest, typewriter, Handgun ammo, a Small Key, and Secretary's Diary A).

Continue into the second-floor hallway, clear the zombies, and grab the Unicorn Medal off the wall. Take the emergency stairs down to the Main Hall, where you'll find a Shotgun by a typewriter. Place the Unicorn Medal in the fountain for the Spade Key.

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Now head out through the main entrance — it's the only unlocked door for now.

Back inside, return to the Licker hallway — the Shotgun makes quick work of them — and continue into the storeroom: Shotgun ammo in a cardboard box, Ink Ribbon in a gray vase, and the Blue Keycard on a crate (a Licker drops from the ceiling as you leave). Use the Blue Keycard on the Main Hall's computer to unlock the station's sealed doors.

Through the newly unlocked double doors is the waiting room (three zombies inside): a Police Memorandum file on a bench, and a locked small table you can open with the Small Key for Handgun ammo. Continue to the next corridor (Handgun ammo on a corpse), then use the Spade Key on the locked door into the Records Room — a patrol report file on a shelf, and a First Aid Spray you can reach by pushing the small ladder inside.

Grab the Green Herb along the main corridor, fight off two zombies that break in through windows, then take the double doors into the meeting room — the Operation Report File 1 is on the table near the chalkboard, and the back room's fireplace drops a Red Jewel when lit with the Lighter.

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Continue to the Dark Room under the stairs (Handgun ammo, Ink Ribbon, Operation Report File 2, a typewriter, and a storage chest).

Head up to the second floor and find the stone statues — push the gray one onto the tile to the left of the large statue, and the red one onto the tile to its right, to drop a second Red Jewel (Handgun ammo is hidden behind the statue too).

Continue into the S.T.A.R.S. office: Chris's diary on his desk, Handgun ammo behind Wesker's desk, and a Magnum in the closet.

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Continue to the lounge — a girl flees through a hole in the door, dropping the Rhombus Key. Check the lockers here for Shotgun ammo, then witness Claire's brief appearance and take the radio she gives you.

Down the right hallway, open the small locked table with the Small Key, then enter the library. Zombies smash through the windows as you advance; climb up, and the floor collapses under you into a hidden alcove with a plaque showing the correct shelf layout. Press the wall button, then push the first and second shelves from the left to slide both right — this reveals the Bishop plug.

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Back on the second floor with both Red Jewels, head to the storage room near the crashed helicopter and use both jewels on the wall busts — the center statue opens, revealing the King plug. Take the Rhombus Key down to the first floor's left hallway; you'll come back here once you have the rest of the chess plugs.