The Slaughterhouse Nightmare

This dungeon is relatively hard and so it is recommended that you have an experienced tank on the group as that role is very important here. Furthermore, there are a few intense DPS tests in this dungeon, so you should get as much purple gear from the other nightmare dungeons before attempting this one.

Psychoassailant

This fight is relatively straightforward. There is nothing specific that needs to be impaired and there are no hidden mechanics to be aware of.

Beware the eletrical pulses that the power rods release periodically.

Frost Grapple
The boss will occassionally cast this ability which snares the tank’s movement down to 10%, however it does not deal any damage, so unless you need to get to the other side of the room, you can just let the boss cast this attack. If you want to break out of this attack, you can use dash abilties like Death From Above to get out of range.

Charging Sphere
With this ability, the boss will give himself a buff that triggers a DPS race. If your group do not deal enough damage to the boss within 10 seconds, the tank will be killed instantly. It is not too hard to meet the DPS requirements for this one, so it’s usually not a problem.

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This boss fight can be quite tricky to get right and there are probably several variations of how to do it. Feel free to leave your suggestions in the comment field at the bottom of the page if you have any.

The blue aura around the boss will wake up the other adds in the room if it comes near them. Make sure that this does not happen, or at least avoid having many of them awake.

Alternating Current
It will attempt to cast this ability at some point during the fight. The tank should immediately impair this one to avoid having some of the arena rendered dangerous.

Burning Plasma
The boss will at several points during the fight go to the central point of the four pillars and cast this ability which will send a blue smoke flying across the entire arena. It is crucial that everyone hides behind the pillars, preferably the one near the corner of the room.

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This is a pure DPS race. There are no special mechanics besides beating the boss fast enough and staying away from the activating rods.

As mentioned above, stay on the right side of the arena as the rods on the left side will activate first, then the rods in the middle and then the ones on the right side.

There is an alternative way to get by this encounter if your group has relatively low DPS, does not have a leech healer and does not have a powerful tank. What you can do is to have the healer use blood shields. As soon as the electrical rods on the right side activates, the healer shields everyone with blood shields and everybody has to get to the left side of the arena as fast as possible as the rods will be deactivated over there.

Cybulski

This fight has an interesting mechanic that you cannot ignore. There is no DPS race and no impairs are needed as they won’t do any good in particular.

Avoid the bosses AoE attacks. There are two of them; one is blood coloured and the other one is blue-green glowing.

Throw Off
The boss will cast this ability several times during the fight. It will send the tank flying backwards and the boss will move to the centre of the room. It is important that everyone hides behind the consoles as the boss will activate a large AoE attack that will kill anyone within line of sight.

After the large AoE, the boss will be extremely aggressive and needs to release his aggression onto somebody. Shoot at scientists to have them move towards the boss so that he can release his aggression onto one of them. If a player is caught by him instead, that player will be killed.

Vampiric Plunderer

This is perhaps the easiest fight in many ways, however, this is actually a DPS race, though it’s not very hard to get by.

Close Encounters
The boss will activate a cone attack every now and then. It can be impaired or avoided.

What consitutes the DPS race is the adds coming out of the tanks. If they reach your team, you will all die a horrible death, so get DPSing!

Aleksei-Chetyre

This fight is a bit complicated, especially in nightmare mode, but we’ll deal with every element one by one. This fight has two main phases.

Phase 1

Ice Shot
This attack will put red AoE circles around multiple players. What you need to do is to get away from each other so that your circles aren’t overlapping. You can survive one of these, but not two at once.

Ice Bombs & Adds
The boss will at several points of this phase return to the far end of the room and start shooting ice bombs at the floor that explodes and spawns adds. You have to deal with those adds immediately. Don’t let them come within melee range for too long or you’ll die.

Ice Cluster Imprisonment
This might not happen during your encounter as it’s a bit random, but sometimes the boss will imprison one of the players (most often the tank) inside a big cluster of ice. You have to destroy this ice cluster as fast as possible before the player inside dies. Do not underestimate this attack.

Eventually, the boss will have shot so many ice bombs at the floor that the floor will break and you’ll all fall down, a transition that reveals the unexpected second phase.

Phase 2

You will find yourself in a cellar filled with flesh overgrowth. Go to the other side of the cellar and combat the flesh boss called Aleksei-Dva.

Note! If you die during the second phase, you will not need to redo the first phase. Instead, you will spawn at an anima well down in the cellar allowing you to resume the fight from the beginning of this phase.

The tank should approach the boss directly while DPS players and the healer should stand on the left or right side. Aleksei-Dva has a frontal cone attack and will usually also spawn a few adds. Down this boss as fast as possible.

Warning! If an eletrified add called Conducting Experiment spawns, one of you will have to use the ability called Chaotic Pull on it to make it vulnerable, otherwise it cannot be killed and it will gradually kill all team members.

Once you have defeated Aleksei-Dva, go back to the other side of the cellar to combat Aleksei-Chetyre who now grows huge.

Much like the Ice Cluster from the previous phase, Aleksei-Chetyre will cast Splatterhouse to trap the tank in a flesh clump. This attack can not be impaired, instead you must dodge and break line of sight.

As you keep draining Aleksei-Chetyre’s health, Aleksei-Dva will return from the dead. All DPS players should switch focus to the flesh boss and kill that one first!

When the Flesh boss is dead again, switch focus back to Aleksei-Chetyre. Once you get him down to 1 HP, he will become invulnerable and another boss called Aleksei-Raz spawns. You will need to kill that one before you can kill Aleksei-Chetyre and you only have 60 seconds to do this before the entire team is instantly killed.

Once Aleksei-Raz is dead, finish off Aleksei-Chetyre and be victorious!