BATHYSPHERE STATION
Follow the all-knowing arrow's lead, going east into another bathysphere port. As you approach the pod, the bathysphere takes off without you as you receive a message from Sander Cohen.
Double-back to the previous room, but be careful. There are newly-set electrified wire traps all over, and a pack of spider splicers roaming the room (and the ceiling). When you've cleared the room, go south to the Lower Atrium.
LOWER ATRIUM
The large area's pretty empty for now, though if you go exploring you'll want to watch out for a security camera mounted over the vending machine to the south (it's easy to hack).
The all-knowing arrow wants to lead you up the stairs in the center of the Lower Atrium, but there's a lot of space to the south that you can explore right now. Since we're fans of exploration, we suggest going south where you'll run into a couple of splicers. There are bathrooms to the left (east), inside one of which is a turret (be careful).
There are some more side rooms a bit further south, including the Sophia Salon. Be aware that exploring some areas will trigger the spawning of spider splicers on your way to the Cocktail Lounge.
UPPER ATRIUM
The all-knowing arrow urges you westward once upstairs, but there's a room to the south you might want to explore. Watch out for a mounted turret on the upper walkway of the room that guards three safes. You can hack the safes to collect some worthwhile goodies before following the wisdom of the arrow.
You'll go west into a parlor with a security camera on the western wall. The camera is easy to spot and easier to dodge so you can hack it from underneath. To the north is a stairway that leads to an upper alcove that's half blocked-off. For now, just go back downstairs.
On the southern wall is an elevator. Call the elevator to you via the button on the wall and be ready for a few splicers that invade the room from the stairs to the north. Take 'em out, then ride the elevator into the Fleet Hall Theater.
FLEET HALL THEATER
Don't be alarmed by the pianist in the spotlight. Approach him and he'll play his tune under the demand of Sander Cohen. Eventually, somethinghappens, and Sander Cohen asks you to photograph the pianist with your camera. Take one photo of the pianist (but only after Cohen's asked you to).
Before leaving the theater, go to the southern end of the upper level. There are doorways that lead to small balconies overlooking the stage, and on the balcony to the far southwest is a tonic. Unfortunately, the doorway to this balcony doesn't open for you. You'll have to step onto the balcony just east of it, then jump from one balcony to the other to grab theAlarm Expert tonic.
Expect a few Houdini splicers to congratulate you on your find (by attacking you, of course). Make your way back downstairs and out the doorway through the north, but beware a pair of security turrets mounted just north of the theater's exit. If you can get by them, there's a safe in the back corner that you can hack open.
UPPER ATRIUM
The all-knowing arrow leads you back to the Upper Atrium and then downstairs. At the base of the stairs is a massive sculpture. To complete the current task, walk up to the sculpture and activate one of the empty frames to place the photograph you've just taken. Cohen should then give you a new set of tasks. Before embarking on the new quest, grab the cross bow in the hands of one of the sculpture's characters.
Go back upstairs and continue east from there. The doorway to PoseidonPlaza will open up for you, letting you continue down a frozen hall
FROZEN TUNNEL
Examine the frozen tunnel and your first target, Martin Finnegan, will make himself known. After the brief scene unfolds, ready your weapons to fight him. Fortunately, Martin doesn't seem to be any tougher than your average Houdini splicer—in fact, he's standing completely motionless among the other frozen bodies, letting you get off a one-hit kill if you can find him (hint: he's right in front of you, on the left). Take him out, then photograph his corpse per Cohen's request.
Return to the Lower Atrium area to deposit the second photograph in one of the frames, at which point Sander Cohen will reward you with another gift. At that point, a big daddy and little sister combo should enter the scene with a bunch of splicers. Let the big daddy take out the splicers, and then get ready to take him down yourself. If you earlier hacked thesecurity camera to the south, that'll give you all the weapon you need to take on the big daddy.
Go back upstairs to the Frozen Tunnel and continue south to the Poseidon Plaza.
POSEIDON PLAZA
As you enter the area just south of the Frozen Tunnel, watch for spidersplicers crawling along the ceiling en masse. Continue to the south end of the area, for now ignoring the stairs. You'll eventually enter an area called Sinclair Spirits.
Watch for the security camera mounted on the wall to the right as you step into Sinclair Spirits. You can hack it, letting you freely explore the room. Behind the counter to the south is a switch that opens a door to the east. The door leads to a small cellar with a weapon upgrade station and a safe. After you've used both, watch out for a newly-awakened spider splicer in the cellar.
Go back to the main Poseidon Plaza area and look for a stairway that leads down (there are others that go up, but we'll check them out later). The stairs lead to a flooded room at the corner of which is the Extra Nutrition 2 tonic. As you grab it, the room fills with what appear to be statues of spider splicers. They are in fact real splicers—try to take them out before they "wake up" (the crossbow works well).
As you return upstairs, you'll likely run into a little sister with her big daddyescort. If you took our advice earlier and hacked the security camera in the Sinclair Spirits area then you've got something with which to bring down the big daddy. Lure him into Sinclair Spirits and hold him in front of the camera long enough to get a small army of security bots to bring down the big daddy.
Back in the main plaza, look for a doorway with a sign overhead labeled "Sir-Prize." Inside the door you'll find a few splicers fighting amongst each other. Let the one with the security bot kill the others, then kill the splicer controlling the bot and hack the bot to make it yours.
EVE'S GARDEN
There are a few useful vending machines in Eve's Garden, and a semi-hidden path behind the dancing stage. Follow the hall to the far southeast corner of Eve's Garden. After a brief flashback dialog, the door at the end of the hall will open.
There's a crackable safe inside the room, but not much else. However, visiting this room acts as a trigger for an outside event. Follow the hall back to the dancing stage and you'll find Hector Rodriguez, your third hit for Sander Cohen. As he runs away, he leaves behind an audio diary on the bar.
Unlike the other hits, Rodriguez high tails it, running away from you. Give chase and zap him down—one well-placed crossbow bolt to the back of his head will do the trick. When he's downed, take a photo of his corpse to fulfill Cohen's request.
To finish exploring the upstairs portion of the hall, look for an automatic door just left of the main stage in Eve's Garden. The stairs lead you to the upstairs hall we earlier skipped on. From this angle, you should be able to safely diffuse the two turrets at the eastern end of the upstairs hall. When you're done exploring the area, return to the Lower Atrium (the all-knowing arrow should lead you).
LOWER ATRIUM
Place a third portrait into Cohen's sculpture at the base of the stairs. As you do, the room floods with splicers. Stay on your toes and watch your peripherals, constantly turning around to intercept new enemies. They're all thuggish and spider splicers—nothing too tough—but they come for a long while. Eventually, the splicers will stop coming. Accept the gift from Sander Cohen (via the statue on the right side of his sculpture).
When you've collected the prize, place the fourth and final picture into the last frame of the sculpture. Sander Cohen will grace you with his presence (don't shoot him) so that he can admire his artwork. Follow him over to a glass case and he'll open it up for you, revealing the Medical Expert 2 tonic.
Now that Cohen's out in the open, you can inspect his previously lockedroom in the alcove above the Fleet Hall Theater entrance. Go upstairs and head west towards the theater. Before entering the theater, go up the stairs to the right (north) and you'll find Cohen's room with an audio diary and the Electric Flesh tonic. When you've got the goods, follow the all-knowing arrow's advice and return to the bathysphere, heading forHephaestus.
