Gil is addicted to the ADAM-infused plants that are being cultivated throughout the ADAM Research Laboratory. It’s going to take four of them to lure him out of hiding and to get the Genetic Key you need, but he’s nice enough to give you the first one. So now you only need to find three more.
First things first, however: a pair of Alpha Series are set to attack before you can leave the area. Get your Proximity Mines out quickly and set the Research Camera rolling. Summon your Elite Security Bots if you hadn’t already, then switch to Telekinesis to catch any inbound Frag Grenades and hurl them back at the Alpha Series who fired it. One of them probably has a Launcher while the other uses a Machine Gun or Shotgun. Focus on one at a time and use the Heat-Seeking Rockets you picked up on the way in from the airlock to take him out. The Proximity Mines and Elite Security Bots should soften the other one up nicely by the time you get to him.
The nearest ADAM-infused plant is in the Pacification Showers, to the north of the area where Gil is located. This is where failed Big Daddies, particularly those of the Alpha Series variety, were sent to die. Hack the Security Camera in the preparation room and rummage through the storage crate and the control room for items, then descend the stairs to the Pacification Chamber where you can find the desired plant in the corner.
An Alpha Series and a Splicer or two attack right after “Alex the Great” decides to lock you inside the Pacification Chamber. Charge up Hypnotize 3 and befriend the Alpha Series, then lay waste to the Splicers. Refresh the befriend effect with another dose of Hypnotize 3, then go up the stairs towards Gil’s tank—there’s a Little Sister to deal with.
Big Daddy: Rumbler
A Little Sister and her Big Daddy have wandered into the ADAM Research Laboratory while you were out collecting plants for Gil. The battle with this Rumbler becomes exceptionally easier for you if you manage to befriend the Alpha Series that attacks downstairs (if this is not possible, try to at least befriend a Houdini Splicer). Lead him up to the main lab and fire a few Heavy Rivets at the Big Daddy to send your befriended Alpha Series after him. Summon a new Elite Security Bot to replace any that fall in battle and watch for the Rumbler to toss out a Mini-Turret. Splash the Rumbler with Security Command as soon as the Mini-Turret lands to make it target the Rumbler.
If all goes well, the Elite Security Bots, the re-focused Mini-Turrets, and your befriended Alpha Series should succeed in dismantling the Rumbler just as the Alpha Series is about to be slain. Timing it so both the Big Daddy and Alpha Series perish in the same moment is ideal. After all, you don’t want to have to kill a Big Daddy only to be faced with an Alpha Series who no longer wants to be your friend! If you don’t have Hypnotize 3 and can’t befriend an Alpha Series, then rely on Heat-Seeking Rockets and Proximity Mines, just as you have done in the past. Also, put your Telekinesis to use to catch and return the Heat-Seeking Rockets that the Rumbler fires at you!
Little Sister Encounter
Gather #1: Near Gil’s TAnk in the Adam LAb
This Gather corpse is on the floor in front of Gil’s Sea Life Tank, near the Gatherer’s Garden machine. String up several Trap Spears at the base of the two sets of stairs flanking the corpse and also near the area coming in from the showers. Place numerous Trap Rivets or Cyclone Traps on the floor around the corpse and a Mini-Turret nearby too, then set the Little Sister down. Charge up Hypnotize just in case a Houdini Splicer manages to penetrate your defenses, otherwise just stand back with the Machine Gun or Shotgun in hand and play defense. Many of the Leadhead Splicers and Houdini Splicers that attack emerge from the direction of the showers and the airlock up the stairs. Your Elite Security Bots should flush them out and distract them. Chances are good that your Little Sister survives this without a single hair on her head being harmed.
Gather #2: In the Showers area
Make a quick return trip to the showers area and lay your defenses around the entrance to the area and the Patient Observation Room where the controls are. It’s very unlikely that any Splicers come up the stairs leading from the showers themselves, especially if you have two fresh Elite Security Bots patrolling the area. Set the Little Sister down and stand to the north of her, watching closely for any Splicers that make it down the steps or out of the control room. Your Trap Spears and Trap Rivets should hold them off, and if not, it shouldn’t take more than a single blast of Phosphorous Buck to finish them off!