The Drill
You find yourself in a large chamber with a drilling machine. Get some items from nearby crates and then head down a ramp toward the drill. As you are heading down the ramp, look off to the right and use kinesis to get some ammo. There is also a container down in a pit to the ramp's left.
Go talk to Ellie. The drill is missing a power cell. While Ellie gets into the cab of the drill, you must find the other power cell and bring it back to the drill.
Search the area around the drill. There are some crates from which you can get useful items. Behind the drill are several Cysts. Throw a metal rod or containers at them to kill them.
Move through the area where the Cysts were and open a power cell container. Use kinesis to extract a power cell and carry it back to the drill. Insert it into the drill. However, it appears that the drill needs something else to fix it completely. When you inserted the power cell, the circuit junction shorted out. You must go find another circuit junction.
Make sure you have found everything on the lower level, then head up the ramp. Along the way, pick up a semiconductor positioned on some rocks and get items out of containers.
When you reach the cargo lift, climb aboard. Activate the controls to move across to the other side of the area. Reload all of your weapons; things are about to get exciting.
Once the cargo lift reaches the other side, a couple of Super Slashers will rush toward you. Hit them with stasis to slow them down or deploy some mines in front of them. Finish them off with the contact beam or another weapon such as the ripper.
Get an item from a container, then use kinesis to pull off the GRIP panel. Pull out the circuit board, return to the cargo lift, and ride it back to the ramp.
As the cargo lift stops, a Super Puker will rush and attack you. Hit it with stasis and then kill it quickly. When you're done, head down the ramp.
Return to the drill and insert the circuit board into the slot. The machine does not recognize it, so you must hack the system and make it work. Once the drill is fixed, Ellie gets it started up.
Ellie has to turn the drill around. As she does, the Pack starts coming at you from two different directions. Back up against a rock wall and use the ripper to saw through them as they charge. Use the same tactic against the two Slashers that join in the rush.
Once Ellie has the drill turned around, run to the lift located on the drill's side and ride it up to the top.
Ride to Government Sector
There is a platform atop the drill. You can stand here while Ellie drives the drill toward Government Sector. However, don't just stand there. Reload all of your weapons and be ready for some action.
Slashers and Lurkers drop onto the deck of the drill. Use the ripper to cut into them before they can hurt you.
Look off to the drill's right side. Use kinesis to get ammo and to pull an explosive canister or two onto the drill deck. However, don't pull too many onto the platform since the Lurker projectiles can detonate them, causing you damage.
A trio of Lurkers off to the right will start shooting at you. Launch an explosive canister at them, killing them all with one blast. You don't need to kill every enemy on the ride. The main thing is to make sure you have enough ammo to deal with any Necromorphs that climb aboard the drill. Try to use kinesis to launch objects at the Lurkers whenever you can—again, don't worry if you miss a few.
Get the ripper ready to deal with a Slasher. Use the alt-fire mode to shoot saw blades at a couple of Lurkers that climb onto the deck before they can fire at you; then turn around and saw into another Slasher.
More Lurkers and Slashers will attack. Then two Lurkers up on a rocky ledge to the left will start shooting at you. Shoot off their tentacles to kill them, and keep scanning from left to right to make sure nothing is coming at you undetected.
Eventually the attacks will stop as the drill reaches Government Sector. You have finally made it.