Clear a Landing Zone for the Vtol
Don't get too relaxed, it's up to you to clear the landing zone! Use your sniper to target the drones on the platform, then make sure to look out the other window when the helicopter turns and target the flying enemies first, then the remaining foes below. The helicopter will touchdown when cleared.
After disembarking from the chopper, head down into the field and take cover behind the rocks, just below the archway. Focus your efforts on the flying bots (two waves) then turn your attention to the enemies on the ridge just beyond. Once clear, climb onto that very ridge.
Find a Way into Station Genesis
Once on the ridge, hang back and use your sniper to pick off the foes (if you need cover, the nearby rocks should work nicely). But keep an eye out for two chameleons who'll charge toward you--remember, if the screen starts to shake, one's nearby. If you have the sniper ammo to spare, resist pushing forward until the enemies completely retreat into the tunnel. Once they do, seek cover on the right side of the rocks ahead and blast the tunnel-based enemies ahead.
Head inside the tunnel when the enemies retreat and use the rocks on either side for protection as you kill them. But don't get cocky--once they're now, two Ravager's will burst through a wall ahead. Try shooting them up a bit here, but retreat outside once they start to get close and tackle them there for more room to maneuver. Once cleared, continue through the tunnel and off a drop off.
Check the tent on the left for guns and ammo, then continue onward up the hill and into the tunnel. You won't get very far, as you'll encounter a couple of Chimeran carrying shields and a few other drones. Immediately retreat back down the hillside and tackle them from afar--not only will this allow you to shoot them from the side (rendering their shields useless), but they also won't pay you much attention! Once clear, continue through the tunnel until you watch a cutscene.
After the cutscene, wait by the tunnel entrance and blast the Leapers that climb to your location. You'll encounter a second group just a bit further in--blast them while backing up, be careful not to fall into the abyss. You'll soon cross through a door into a rather industrial looking base. After crossing a bridge, you'll reach what appears to be a split-path, but the right route is merely a giant loop, which you'll be using shortly. As you open the door ahead, two shielded enemies and a ton of drones will come your way. This group will quickly devastate you if taken head-on, so back up into the hall, moving back from corner to corner as the wave comes your way (eventually retreating into the round-a-bout mentioned earlier), shooting them whenever you get the chance. If you have the shotgun, its secondary feature can take down the shielded enemies in just a few shots.
After passing through the room into the hall beyond, prepare for two chameleons to attack, one after the other. Grab the Wraith at the end, then ride the lift down a floor. Seek cover behind the first barrier and use the Wraith to destroy the enemies beyond--or try tossing a grenade at the group for a quick victory. Once everyone's dead, don't get too excited, as a few more drones are about to ride down the central lift--seek cover behind a barrier facing toward it. After you've cleared the lift, ride it down.
Locate Dr. Malikov
Once off the lift, you'll spot two enemies equipped with Augers in a tunnel ahead. Quickly run up the right hill to attack them from the side, then grab one of their dropped Augers. In the tunnel ahead, you'll come across a locked door, and for whatever reason, the switch to unlock it is further up the hall. Continue onward, but prepare for a few drones shortly, though your Auger should take care of them easily. You'll find the switch you're looking for at the end of the hall, on the right.
Hmm, maybe flipping the switch wasn't such a good idea, as a gnarly swarm of...something will chase you down the hall. You're going to have to run back to the now-unlocked door, whileshooting the swarm to keep it at bay. From the get-go, turn around (away from the swarm) and run down the hall to the second bend--turn around and fire a few shots at the creature to stun him, then continue onward, stopping at every corner or two to turn around fire a few more shots. The cable on the floor will lead you right through the door you unlocked and onto a lift, which will take you upward.
After riding the lift, continue onward through a hallway--but your smooth-sailing will be cut short by the reappearance of that damn swarm monster who's blocking the way! Quickly back away, while shooting it a few times to slow it down (like before) until the monster retreats through a vent into a side-room...but you're not done yet. The monster's merely going to reappear behind you, but now's your chance to get by! Dart down the hall, stalling the monster on occasion with a few shots, until you find the Doc in the room at the end of the hall.
Escort Dr. Malikov Out of Station Genesis
Follow the doctor through a few halls until you wind up on a walkway inside a vast cavern. Grab the Fareye by the door and use it to target the enemies along the left wall, including a couple of shielded foes--you should be able to kill them all before they pose a threat. Now follow the walkway to a lift at the end.
Continue across the rope bridge, then drop into the electrical-chamber thing on the left, which keeps the swarm monster at bay--shoot him a few times to send him reeling back to mommy, then follow the Doc into the tunnel beyond to another electrical chamber. Once there, the Doc will lower a bridge ahead, but that swarm-thing will reappear as you try to cross it. Quickly retreat back to the electrical chamber for protection, then blast an enemy that cross the bridge, and wait for the swarm-monster to circle around the back side, then make your way onward, across the bridge, shooting the swarm occasionally to hold it off.
You'll be ambushed by several drones as you enter the next room. Hug the left wall closely and attack the enemies as they enter your field of vision, peeking around the corner occassionaly to prevent them from getting two close. After the initial wave, two Ravagers will show up--tackle them the same way, using the wall for cover. They may get real close, but they should hopefully be distracted by the doctor, allowing you to go in for the kill.
Neutralize the Swarm
Follow the Doctor to control panel that governs the three electrical chambers--yup, you guessed it, you'll have to lure the Swarm into each one which the Doc handles the controls. Lucky you! Catch a ride on the nearby lift and hightail it over to the first chamber. Stand inside it for protection and wait for the Swarm to come for you. You'll find that the swarm will merely circle the chamber tirelessly, leaving it to you to actually lure him in. Inch toward the swarm until it starts coming your way, then quickly run back into the chamber and out another side. With the Swarm now caught in the chamber's grasp, the Doc will let the electricity fly, holding the Swarm in place. Now grab the Cannon from the nearby corpse and fire it at the swarm, but get ready to dash up the nearby ramp leading to the next chamber. Do the same thing there, then again at the third and final chamber to kill the swarm off for good.
Neutralize the Titans
Follow the Doc to a lift to get the heck outta here. Back on the surface, you'll have to face a couple of Titans just after a drop-off. As we're sure you know by now, Titans are tough, and taking on two is no cakewalk. However, there's a rocket launcher right by where you landed that can be instrumental in taking these guys down. Because you only have four rockets, you should only fire two per Titan--this will weaken them enough that a few shots from your gun can finish them off. Start off by firing a pair of rockets at the Titan on the left first (simply move side-to-side to evade his counter-fire), then quickly follow up with your gun to finish him off, before turning your attention to the Titan on the right. Do the same, then tackle the little leapers dancing around.
Once all is clear, continue onward to board the chopper and complete the level.