Head to Oscorp Tower again and make your way inside. There's a few Hazmat guards in here. Just crawl around on the ceiling and they should be quite easy to take down. The only trouble is a group of them on one side of the room, You'll need to wait until one of them leaves to get the other two OR take down and fight the third. Near the front desk will be a broken window on the left side. Go through that window to get to the next room.
In this room, you'll find more hazmat guards and a guard with a shield. Unfortunately, there's not really a whole lot to work with in here so I would focus on the guard with shield first. Use the Surprise Attack by jumping over him and hitting from behind. Take him out and then the other two should be no problem. When they are all down, destroy the object that's powering the force fields.
Go into the next room with the glass floor. There's quite a few enemies in this room but only one of them has a shield so I would take him out with a stealth takedown before anyone else to make it a much easier fight. At this point, just use the Web Rush Combo Technique to make short work of them. Gwen will send an elevator down to you after the fight. Hop on top of the elevator and Web Rush up the shaft. There will be a hole near the top that leads to another very similar room.
Take out the guard right by the elevator first, then the guard crossing the middle of the room. Head over to the one inspecting the acid on the side of the room. Another Elevator will come in on the other side of the room. Before you leave, check the reception desk for a Magazine. Stand on top of the new elevator and make your way up the shaft. At the top, enter the vent. Crawl through the vent.
The vent will open up a little to the sides so watch on the left for a Metal Box and just before you leave this area will be another Metal Box tucked in a corner to the right.
When you exit the vent, you'll come to a round room. There will be two forcefields and behind each of them will be a generator. You'll need to grab the sentries that are coming through and throw them at the generators. Hold the Web Shoot button to grab the sentry and then push the analog stick in the direction that you want it to go. When both have been destroyed, there will be a cutscene and you'll have to face off against two green guys with chain guns. Instantly Web Retreat and then crawl around the ceiling behind the lights. Nab both of them in a stealth takedown.
After you take them both out, a door will open on the bottom floor. Just to the right of that door will be a Magazine. Grab it and go through the door. In the next room, you'll find a turret mounted to the wall. Destroy it and then check the sides of the room to find a Metal Box. Climb up to the raised area and on the right desk will be a Magazine. Grab that and then go through the door under where the turret was. In the next room, head left and through the hallway. This will bring you back to a fimilar triangular room. Head left again as you did at the beginning with Gwen.
The room is a little more perilous this time. On the right wall will be a turret. Take that out and then activate the terminal to unlock the door on the other side of the room. Web Rush through the hole in the laser net and try to take out the turret on the left side of the room. There's one more turret along this wall a little ways ahead so take that out too. Now drop down and go through the open door.
Go through the fan like you did last time, then go through the next fan. You'll come to the second laser net. Use the terminal like you did last time and then Web Rush through the net. Take out the turrets on the far side and then go through the open door. Climb through the vent like you did last time which is not covered this time (nice touch!). This will put you right next to the quarentine room. Talk to Gwen and give her the cure...
Escape
Man, that did NOT go the way I thought it would. You're going to be attacked by a new version of the sentry. It will attach to you and shock you. You have to tap the strike button rapidly to dislodge it and it will explode when you do. Rather than fight them, run away from them because they are pretty dangerous and almost always manage to attach to you.
Go through the open door nearby, making sure to grab the Metal Box on the way. In the next room will be a group of hazmat guards. Unfrotunately, you can't just run through the room because there's a forcefield on the other end. Go to the upper level and destroy the generator there to take the shield down. Grab the Magazine next to the generator on the desk if it's still there.
This will put you in the round room where you'll be locked in and attacked. Basically, try and keep moving with Web Rush and Web Retreat to stay alive until the door opens. Find the door open about mid way up the wall. Go through the door and you'll be in an elevator shaft. Follow the elevator up will avoiding the laser nets. Keep Web Rushing to the top. As you climb, be sure to watch for turrets. Go through the doorway at the top.
In the next hallway, you'll have to web rush through a hallway with a bunch of bots. The next hallway after that will have a turret in it and a Metal Box on the floor in a corner. Keep moving along the long hallways. At the end of the hallways, you'll be an a large round room with a bunch of infected scientists. Use a stealth takedown on the two in the center, then the two off to the side. Take down the individual near the desk.
After the infected are gone, some gunmen will smash through the windows on the upper level. Use your Web Rush to get up there and attack them. Make sure you are fast. Getting up there in the first place is the toughest part. Take them down one by one and watch out because ther may be a Magazine in one of these small rooms.
You'll enter another Sentry guarded hallway. Zip down the end of this hallway and go through the small hall in the corner of the doors at the end. On the other side, make your way to the end and go through the doors filled with fog.
Scorpion
This fight is similar to how you fought Vermin but he's got a few different attacks. Watch out for when he jumps up in the air and sprays acid around on the floor. It's best if you swing around the room to avoid touching the floor when this happens. When you are on the walls, watch out for when he spits acid at you. Lastly, when you attack him, if he glows green, do a web retreat because he's going to make a fast attack that you can't evade. The fight will end after you deal enough damage. This will put you near the lobby of the tower. From here, go into the next room and exit the building through a window.
*Achievement: Tail? You Lose.
S-02
Make sure to take a picture of S-02!
Start swinging around immediately. When S-02 starts focusing in with it's aiming lasers, use Web Retreat to avoid the attack. This is really a must because nothing else will work (except maybe a really quick Web Rush).
Swing around S-02 and look at the bumps on it's body. On the first one, there should be a small blue circle. Hit that with your web shooters to bust it open. Once you've busted it, S-02 will go under ground and then attack you with it's claw. Be prepared to evade that and then you will whip around the back of the robot automatically. When you do, be prepared to Web Strike the red spot.
This will destroy the first node. You need to destroy the second node the same way but make sure that you are diligent about using Web Retreat because during this second round, a single laser blast will put you out of the fight. Unfortunately, there's no checkpoint here either so if you die, you'll have to start the fight over.
After you destroy the second node, you'll fight S-02 on the roof of the tower. There is a checkpoint here in case you die. The robot will start attacking you with it's claws so make sure you are ready with your Web Retreat. If you use it just before you get hit, it will hit you during your invisibility phase and you'll take no damage. It will also you use a Laser attack where it swings the laser across the ground. Again, use Web Retreat and you'll avoid all damage.
To damage him, you'll need to Web Shoot his blue eyes. After you've done enough damage, he'll take a big swipe at you and you can use Web Rush to trap his claws to the Helipad. Then Web Rush his mouth to deal damage. After you do this a few times, You'll get a cinematic where you need to Web Rush an antenna and then hammer on the web shooter button. This will finish the fight.
*Achievement: Big Apple, Big Worm
Second Try
After you return to your apartment, you'll pass out. When you wake up, Connors will have another cure for you. Head into the city with it and you'll notice your map is a little messed up. Follow the red marker in the sky to the source of this disruption. You'll find a scrambler surrounded by three sentries. Take them out and destroy the scrambler (or just destroy the scrambler) to get your map back.
Now head for the Oscorp Bio Labs because you can't get in the same way twice. There will be Snipers on the roof where you are trying to enter so be careful. However, if you happen to die on the roof, when you start up again, the snipers will be gone.
