Find Suchong
Duck into the ventilation shaft at the base of the wall and follow it around the corner to where the Splicer is. Elizabeth is armed with an Air Grabber (Sky- Hook) and is only capable of a rather weak melee attack that can knock out those who are entirely unaware of her presence. The Air Grabber melee attack can push away enemies attacking her head-on, but it does very little damage. Stealth and surprise are key!
Make your way to the man who is near the door to the north for a little lesson in stealth. He’s likely to turn around and fight back if you make too much noise. Tiptoe quietly (preferably, while crouched) and use the Air Grabber to knock him out cold. If your attempt to be stealthy fails, rush to the vent in the wall to the left. He can’t follow Elizabeth inside the vent. Collect the goodies inside the vent and wait for him to let his guard down before trying to attack him again. This time, try crouching down and approaching him slowly to incapacitate him quietly.
Take the Lockpick from the body and use it to unlock the door on the right. The lockpicking tutorial explains how Elizabeth picks locks. Stop the pick on a white pin to unlock the door, a blue pin to unlock the door and receive a Noisemaker Dart for the Crossbow, or a red pin to unlock the door while setting off an alarm.
Pick up the Medical Kit from the ledge. Elizabeth can store up to five Medical Kits for use when she needs them. Try to rely on food and other consumables to replenish lost health and save the Medical Kits only for those times when Elizabeth is nearly dead. Take a look around the school to see some of the propaganda the youth of Rapture were being taught, then take the Crossbow from the door to the cafeteria.
Crouch down, take the Crossbow Tranquilizer Ammo from the corpse on the left, and get ready for combat. The Crossbow can only fire a single dart at a time and it has a slow reload. You’re going to need to collect these darts from your victims as you use them, or else you’ll never have enough to find Suchong. Crouch down and shoot the man with his back to you, once the other two people have left. Remain crouched near the door and wait for the woman on the right to come into view. She’ll drop the Hand Cannon. The third hostile left the cafeteria; you’ll hear his voice but he’s no threat for now. Have a look around. Search the ventilation shaft for the Medical Kit and Tranquilizer Ammo where it ascends to the upper part of the wall.
Follow the complaining voice to the principal’s office down the hall and through the door on the left. Eliminate this third and final hostile, then scour the desks and file cabinets for loot. Exit the office to spot a sign mentioning Suchong.
Go to the Silver Fin Restaurant
Suchong has taken over a restaurant in the Bathyspheres DeLuxe area. Before you take the elevator to that section of Rapture, you should visit the Cupid’s Arrow Theater off to the left. Use the Air Grabber to crank open the door. Collect the Lockpicks from the counter and search the area for the first Audio Diary.
Pick the lock on the door and obtain the Peeping Tom Plasmid. The Peeping Tom Plasmid makes it possible to turn invisible, so you can get the drop on enemies. You can also see through walls and figure out where your enemies are headed. The Peeping Tom Plasmid is instrumental in helping you navigate Rapture in a stealthy manner. Tap the Plasmid button to briefly turn invisible and to see where your foes are. Hold the Plasmid button to remain invisible. This is a great way to sneak up behind enemies and knock them out with the Air Grabber, but it consumes a lot of EVE so be careful!
Collect the Audio Diary from the dressing room backstage, then crouch down behind the table near the blue dress. Listen for the Splicers to approach, turn invisible as they get near, then shoot them with the Crossbow. If you’d like, this is also a fine time to experiment with using Peeping Tom and the Air Grabber to silently knock enemies out from behind.
Hit up the Circus of Values machine and make sure you have at least two Tranquilizer Darts and two Medical Kits before you leave. Open the door to the elevator lobby, pick the lock, and claim your first Noisemaker Dart.
There aren’t any collectibles or loot near the window on the right, so fire the Noisemaker in that direction. This causes the three Splicers to run over to investigate, leaving you able to slip past them to the elevator. There’s very little to gain by eliminating every enemy; sometimes it’s far better to simply bypass them quietly.
