Frontline Rush Walkthrough

Go to the First Denstack

Frontline Rush is the most puzzle-dense mission in Process 4 so far. The main objective is to mark two denstacks with beacons so UWST can blast them and clear your path to the Aether Test Site. Getting to those beacons, though, takes some work.

Landbreakers Patrol the Area

After activating the Teleport Point, follow the objective marker on the road. Landbreakers patrol along the way. You can fight them or just sprint past; neither choice is wrong and won't have any consequences later on.

Solve the First Puzzle

Eventually, you'll encounter a destroyed part of the highway. Drop down to the level below, activate a Teleport Point nearby, then head east. As soon as you approach the haze, a cutscene triggers, and the wall above the levers lights up with invisible symbols.

Lever Puzzle 1

Look at the symbols revealed on the wall, then look at the image on the container nearby. Pull the lever whose symbol matches the container.

Ride the Steam and Onto the Pressure Plates

After that, head east through the broken fence and use the steam to reach the next area. Down the stairs, there's more Landbreakers, defeat them and follow the marker until you hit the pressure plate room.

Pressure Plate Puzzle

Warning: Don't step on the pressure plates randomly. Triggering the wrong ones activates flamethrowers across the room. Take the stairs to the left first.

At the top of those stairs, you'll find more haze. Look down at the pressure plates to reveal which plates have symbols on them. Step only on the marked plates, and the flames won't trigger.

Open the Path to the Final Puzzle

Go up the stairs and you'll notice that the path forward is blocked by a storage box. Craft an explosive from the barrel and throw it on the crate. That blows open the way. Step through and take the stairs on your left.

Lever Puzzle 2

More haze at the top of those stairs. Look at the storage box blocking the path ahead, and it will show three symbols in a specific order. You need to pull three levers in that exact sequence to unlock the way forward.

Lever	Location
1st Lever	Turn right, climb the crates, and drop down to pull the first lever.
2nd Lever	Go back to the haze spot, turn left, and climb some boxes to reach the lever.
3rd Lever	The third lever is just to the right of a tent with a White Prism underneath it.

Mark the First Denstack

Once all three are pulled in order, continue through the newly-opened path. Interact with the first denstack to place the first beacon.

Wait for UWST Support

The UWST will rain fire on the first denstack. A couple of Landbreakers will show up right after. Defeat them and grab the yellow chest to your right.

Go to the Second Denstack

Head west down the trench where the Landbreakers came from. It's thick with smoke in here but keep pushing west, then follow the path as it curves south past some storage boxes.

Defeat Landbreakers Along the Way

Defeat Landbreakers as you go on until an Aurylene appears on your left. It will float up to a higher area when you approach. Don't worry about it now; you'll be able to grab it soon. Follow the path right and up the stairs into the boss arena.

Defeat the Bonekrusher Siegeknuckles

This elite-class enemy isn't hard to beat. All you need to do to defeat Bonekrusher Siegeknuckles is attack him behind when he guards, step out of his AoE, and interrupt his charged skills whenever you spot the opening.

Mark the Second Denstack

After Bonekrusher Siegeknuckles goes down, head to the northeast corner of the area and climb the short set of stairs. Interact with the mark on the ground to place the second beacon.

Wait for UWST Support

The second UWST strike will blast the denstack just like the first one. When you regain control, remember that Aurylene from earlier? This is also where it floated up, so grab it before you drop down a level.

Defeat the Landbreakers Blocking Your Way

Defeat each group of Landbreakers blocking your way up the hill. Clear them all, and Frontline Rush will end as you reach the Aether Test Site.