Unit 4 - Level 2 - Upper Mines to 

The object of this level is to activate the ventilation systems so the Strogg toxins don’t kill you.

U4L2W1

Enter the first room and pick up what you can carry. Kill the guards and continue along underground to the next large room littered with guards. 

U4L2W2 (strategy)

Pick up the health stimpacks without falling into the rock crusher and climb up the cave wall to the rocket launcher. The moment you pick it up, look up for the two Icarus beats hovering above you. Change to a shotgun or chaingun and dispose of this annoyance. Hop back down, crouch under the walkway to get more rockets, health, and bullets. Enter the elevating platform on the other side of the rock crusher.

U4L2W3

Kill all Strogg here and enter the door to the right. Before you run for the chaingun, look to your left and kill the Gladiator an Gunners. Use the wall for cover of you can. Grab the chaingun and head up the stairs, killing the Gunner and the Strogg on the platform to your right. Continue straight through outside and use your new rocket launcher on the Icarus and Mutant.

U4L2W4 (strategy)

While outside, don’t go down the steps toward the giant fan, move to the right and enter the cave entrance on this walkway. Grab the armor and get ready for a violent fight with the motley crew above the horizontal underground passageway. Use the wall as a shield if possible.

U4L2W5 

Once the coast is clear, head on up into the hallway with blasters shooting across. Kill the Gladiator and run across to avoid getting hit. Grab the rocket launcher and use it on the Gunners in the next room. Step on the plate in the middle of the floor, but look out for the leaping Mutant. Grab all ammo here and continue up the small ramp to the outside. 

U4L2W6 (secret)

Before heading up the stairs, turn to the right and enter this hallway. The panel on the right is an odd color so shoot it for a secret inside. The plate on the floor won’t do anything yet so you don’t need to activate it.

U4L2W7 (secret) 

Head back outside and down the ramp to the bridge. Collect the health and continue along until you find yourself head on with a Gladiator. Collect the health in this room and hit the button to activate the ventilation system. The lower levels are now accessible.
One of the machines to the left of the ventilation button is sparkling so shoot it to uncover some quad damage.

U4L2W8 (strategy)

When you head back outside, don’t let the three Icaruses above scare you! Take them down and head back in the room to collect the health if you need it. Head back the way you came until you find yourself outside overlooking the huge, spinning fan again. Kill the Icarus above and start descending down the stairs. If you’re eyeing that mega-health pack in the corner over the fan, go for it. The way out is to far onto the fan, and through the blades into the puddle of water below. Exit the level through the door. If you don’t want to take the chance of getting a little hurt, continue long the pathway over the fan, into the opening and press the button while stepping on the platform to take you down.

Exit this door after you’ve killed the last of the Strogg in the Upper Mines.