Part 4: Hospital

Story:

Go to <Reception> and pickup SHOTGUN
Go to <Waiting Room> and pickup SWORD
Go to <Store Room> and pick up SOCKET WRENCH HANDLE
Go to <Nurse Station> and use the code from Frequencies and the SWORD decipher to get final code (KRRFZ)
Open safe and obtain INCINERATOR ROOM KEY and EIDETIC MODULE
Go to <Protektor Bathroom> and pick up PUMP ROOM KEY
Go to <Pump Room> and use the drainage system (A to B, B to C, C to A, B to C, A to B, B to C, and C to A)
Go back to <Protektor Bathroom> and jump down
Pick up WATER KEY
Go to <Flooded Office> and pick up EXAMINATION ROOM KEY
Go to <Flooded Store Room> and pick up BLANK KEY
Go to <Exam Room>, pick up 10MM SOCKET and combine with SOCKET WRENCH HANDLE to get 10MM SOCKET WRENCH
Go to <Sleeping Ward> and pick up VIDEO CASSETTE
Go to <Vent Room> and unlock the fan grate to obtain AIR KEY
Go to <ICU 01> and use the VIDEO CASSETTE in the VCR player
In the memory, move forward and pick up the GOLD KEY
Go to <Imaging> and use the x-ray machine on the Lodged Key (memorize the pattern)
Go to <Office>, use BLANK KEY on the Card PC, and use the Lodged Key pattern
Go to <Incinerator> and solve the Gas Valve puzzle by using the indicator on the left and the 3 knobs to adjust CO2, Gas and O2 levels
Pick up FIRE KEY
Insert all keys into the locked door in <Waiting Room>
Enter <Surgery> through the previously locked door, PREPARE FOR A BOSS FIGHT and drop down

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