This game is also available on PS2.
When playing as Chris, after killing the Hunter and the Sweeper in the locker room, go back to the smashed mirror and press Action. Chris will do his hair.
Press Action when Chris goes to the tiger statue. He will put his hand into it and will get cut.
Steve.
When you get to the junction room, where you have the choice of going into the casino room or continuing on with battle mode, check the soda machine after killing everything. Steve will get upset about not having money for the machine. Note: You may also need to try the machine in the locker room.
Wesker.
Look at the human torso in the insane doctor's office. Wesker will tilt his glasses down and look at it disgusted.
Claire.
When Claire in the freezing hallway, after killing the zombies. Walk (do not run) back to the door you came in by and press Action. She will be affected by the cold.
Rodrigo.
Play in first person and go to the first room with the hunters. After killing them, go to the stacked up boxes in the turntable and press Action. Rodrigo will be standing there.
Door-opening Zombie.
In Claire's part of the game, go to the part in the bottom floor of the torture room where you get the piano roll. After you put the sword in the slot turn around, and go to the back of the statue. Without killing the Zombie, pick up the piano roll and leave the room. Go up the steps and you will hear a door shut. Go back to the top of the steps and the zombie will have gone through the door and will be walking up the steps to come after you.