This Achievement can be earned with either character but is easily missed. Once you have the Armor Key, you’ll be able to access the room where Richard is slowly dying; 2F East Wing of the Mansion. When you first enter that room you’ll be sent to go get Serum to save his life; you’ll have 6 minutes to get the Serum from the 1F West Wing Mansion Save Room and come back to him to save his life and earn this Achievement. If you take too long, you’ll find Richard’s dead body the next time you enter the room where he was. A negative outcome of failing to save Richard’s life is that you’ll be unable to earn the Assault Shotgun which is a fine weapon for either character.