Dark Athena Walkthrough - Aguerra
Having crash landed, follow the beach to a sewer pipe entrance and follow it to an underground aqueduct. Proceed up to the closed gate and grab hold of the ledge to the left.
Follow the short hall to a spiral staircase you can climb. Jump the gap and grab hold of the other half of the staircase and stealthily enter the tunnel. Sneak up on the Droid for an easy take down. Now hop over the left box to find a Bounty Card adjacent to the stairwell, then sneak down and prepare to take down a second drone.
Continue along the path, up the stairs and through a door, then along a walkway to another opening and climb the ladder inside. Continue through the door at the top, then up another ladder. After climbing the second ladder, drop to the walkway below, then off the opening in the guardrail at the base of the stairs. After dropping, grab the beam embedded in the wall and follow it around to the other side, where you can drop to solid ground. Run up the ramp and off the far side, then follow the path to another beam and follow it into an opening you can climb into.
Climb up to a walkway above and follow it to a box (just before the locked door) you can climb onto, then leap to a ledge above. Look up to spot a handrail you can grab hold of (make sure you're facing toward the ocean, otherwise Riddick won't grab hold). Follow the handrail to a suspended walkway you can drop to, and follow that to a ladder. Once off the ladder, leap to a hanging pipe on the right and follow that to another ladder. Grab the railing at the top, follow it left to find a Bounty Card, then use the box to jump over the wall to the other side and enter the door, into the Control Room.
Interact with the terminal inside the control room to redirect the waste flow, which will reposition the pipe you just climbed across, leading to a new area. Proceed into the door leading into the Pump Room and get ready to sneak up on another Drone--if he spots you, retreat into the previous room and attack him when he steps through the door. Afterward, descend the stairs and climb down the ladder to the left, at the base. Now exit outside through a door on the left, climb the box, back up to the ledge, and grab hold of the now-repositioned handrail overhead and follow it to the other side. Drop into the center and enter the sewer tunnel.
The tunnel leads into a room containing a sole box--climb it, then climb up to the walkway overhead and follow that to a ladder. Head through the door on the right, leading back outside, and follow the stairs down to another door. Climb down the stairs inside, and make a sharp right at the base to find a wooden walkway you can drop to--although it'll collapse under your weight. After the collapse, drop down and sneak up on the Drone ahead. Continue down the hall, off a ledge, and into a tunnel. Turn left at the exit and enter a nearby sewer pipe, which eventually leads to a ladder.
After climbing the ladder, you'll spot a couple of drones outside. Wait for them to finish their conversation, then sneak up behind them both and kill them when they turn away. Now follow the right wall, up a staircase to find a Nanomed Cartridge. Head back down, turn left and follow that wall to a small alcove containing a Bounty Card (you'll likely find a Drone along the way, though he shouldn't give you much trouble). Continue to follow that same wall up a staircase and along the catwalk to a ledge overlooking an enemy--drop down and take him out. Now continue through an opening to the left to spot two guards, one of which is pounding on a door. Sneak up on the closer one for an easy kill, then go after door dude. With both down, approach the door to talk with some old guy named Pavlo, who wants you to find him a gas mask.
