Kill Sledge and take the Eridian Artifact.
- Kill Sledge: 0/1
- Take the Eridian Artifact: 0/1
- "It's time to push the attack! Infiltrate Headstone Mine and kill Sledge. If you get the chance, grab that Eridian Artifact of his. As Dr. Zed put it, nobody wants another bandit to find it and start another blood-fuelled crusade for the Vault. If you manage to come out of this fight alive, head back to Zed and let him know what happened."
Once inside the entrance to Headstone Mine there is a lengthy path looping a long way around to the south, and almost the entire area is inhabited by hostile bandits. From the entrance, the front area is well guarded and leads to a ramp to the right of a closed gate. A switch at the top will open the gate to proceed directly into the open area beyond, or alternatively a more circuitous route with plentiful cover can be taken by moving through the buildings at the top of the ramp. Overlooking the open ground is a Mulciber Mk 2 covering the path deeper in. Beyond the area and past the Mulciber is a mine tunnel leading to a lengthy area with limited cover and long range combat opportunities on open ground.
Sledge has two main attacks; Sledge's Shotgun and Sledge's Hammer. His shotgun has a very poor accuracy but a high damage and wide spread. The hammer has high direct damage and sends out a shock wave when hitting the ground. The shock wave is an area of effect attack that will damage and knock enemies back. Sledge will try to move into melee range throughout the entire fight. It is recommended that players avoid close contact, instead moving and placing obstacles between the character and Sledge. In some cases it may be preferable to risk close contact briefly in order to escape, than allow a character to be backed into a corner.
Shock damage is especially useful in depleting Sledge's powerful shield. Rapid-fire attacks from combat rifles or SMGs are useful in chipping away at Sledge's health, wearing down his life while preventing his shield from regenerating. Elemental damage over time will also help with this. critical hits can aid the speed at which Sledge can be taken down, however Sledge's only critical hit location is the red glass on his welder's helmet or the back of his head, making this a more difficult proposition for this boss.
After the fight begins, bandits will spawn from both sides of the room. Some may be useful to leave alive as a means to gain a Second Wind. The design of the room is such that characters can loop around a large physical barrier on the right hand side after entering. This obstruction will allow some opportunity to recharge depleted shields before the attack is resumed. The room contains a few potentially fatal dead ends as well.
When Sledge is defeated, loot his chest and collect the artifact. A door will then open in the east wall of Sledge's lair allowing a quick shortcut back to the entrance area, thus bypassing most of the respawned bandits.
- Berserkers with Bash can finish Sledge quickly with repeated rapid punches. This works best by first dropping Sledge's shield with a shock attack or grenade, then using the fire artifact with Berserk. Two berserkers working together can also pummel him down in short order, without having to worry about much retaliation as he is constantly knocked around.
- As with any tough enemy, being able to use skills that maintain the Daze effect on him (such as Brick's Bash or Lilith's Mind Games) significantly reduce the difficulty of the encounter.
- Roland's Scorpio Turret can present a useful diversion, especially when empowered by a Shock Artifact. As the turret shoots Sledge, he will often pay more attention to the turret than the soldier.
- It's possible to lure Sledge out of his arena through the doors, but it is tricky. This can be done by luring Sledge right onto the door, while remaining close to draw his hammer attack. From there the tanking character can be allowed to die, and upon respawning Sledge will have exited the arena. Alternately backing slowly while still in Sledge's hammer's range causes Sledge to come through the door. Once he is out, attackers can sit safely at the other end of the hall (near the vending machines) and kill him from there.
- It is possible to get Sledge's left arm to stick out the right hand door by opening the door and luring him towards it so he hammer-strikes as it closes. Once this is achieved, a high powered incendiary weapon can be used to attack his forearm, setting him on fire.
- It is also possible to maintain the appropriate distance from Sledge that causes him to repeatedly pound the ground with his hammer (causing a damaging shockwave), but while standing behind a waist-high obstacle that completely blocks the shockwave. This allows players the chance to score many free hits as he performs an ineffectual move over and over.
- Transfusion grenades can be continuously thrown through the right door. The ammunition vendor is close enough to resupply the grenades frequently when they run out.
- The entrance doors can be used to keep characters relatively safe by using them in a hit and run strategy on Sledge. This is done by opening the door, firing on Sledge and ducking away while the closed door blocks his ability to return fire.
- "I hardly believe you managed to take down Sledge! I'll put in the word to Helena, and I'm sure if I tell her your story, she'll give you the clearance you need to enter the Dahl Headlands."
- thumb|300px|rightThere is a shortcut to get to Sledge that skips many of the bandits in the way:
- Locate the bulldozer next to the large building where Sledge is supposed to be.
- Jump on the Bulldozer and go towards the front of it.
- Throw a grenade and grenade jump to the adjacent platform.
- Go to the other end of the building and use the checkpoint marker.
- Returning to the room just left to begin fighting Sledge!