The Mountain of Skulls chapter in Warhammer 40K Boltgun 2 thrusts players deep into enemy territory within the imposing Blood Fortress. It’s a grueling test of skill, strategy, and perseverance as you battle through hordes of demonic foes and unravel environmental puzzles. Every step matters here, with each skirmish pushing you closer to the dark heart of the Khrone stronghold.
After wresting control of the fortress from the heretics, the Marines press onward, aware retaliation is just around the corner. This section demands sharp reflexes and careful exploration, because the mission’s success hinges on securing every key and unlocking heavily guarded gates while withstanding relentless attacks. The Blood Fortress isn’t just a battleground—it’s a maze of peril and opportunity.
Table of contents
- Mountain of Skulls – Blood Fortress
- Mountain of Skulls – Blood Cascade
- Mountain of Skulls – Blood Machine
Mountain of Skulls – Blood Fortress
Your journey begins at the edge of a ravine—stick close to its right-hand wall as you move forward. Every enemy you encounter is a threat, so methodically eliminate the opposition while keeping an eye out for incoming ambushes. Eventually, the looming silhouette of the Blood Fortress reveals itself, a grim harbinger of the trials ahead.
Dropping down from the cliff, you’ll face off against the sinister Bloodletters—fast, deadly demon foes never before encountered in the campaign. To reach the red key needed for progression, head left and scale the elevated platform after clearing the first room. That’s when the dreaded Khrone Berzerkers make their appearance, ambushing you in threes. Their considerable damage output means you’ll need to land one or two precise shotgun blasts to take each down swiftly.
Once clear, proceed through the next chamber and veer right into a dim cave swarming with Bloodletters. These enemies guard the red key just beyond. After securing it, backtrack to unlock the red gate, then push through enemy lines to reach a raised area where you can lower the drawbridge. Timing and positioning here are crucial as you prepare for the upcoming challenges.
Behind the drawbridge lies a door secured with a purple key—your next target. Lowering the bridge grants access to the interior, but beware: activating the entrance control panel triggers a purge. Eliminate all adversaries quickly; only then can you proceed further into the stronghold. As you approach the threshold, be ready—this section culminates in a tough boss battle.
The imposing boss, Bloodcrusher, awaits beyond the gate. Unlike standard enemies, Bloodcrusher demands focused fire and constant movement to avoid its heavy attacks. Defeat this foe to silence the purge and gain entry deeper into the fortress, where grabbing the key beyond the boss’s lair will conclude this segment of the mission.
Mountain of Skulls – Blood Cascade
Inside Khrone Stronghold, corridors twist and open to reveal two distinct locked doors at an intersection: red and purple. First, aim to find the red key by exploring along the main path, noting a yellow door blocking your way near the key’s location. Once retrieved, use the red key to open the corresponding door and advance to the barricade control panel at the end of the hall.
Activating this panel lowers blood-filled barricades, temporarily revealing ammunition caches—make sure to capitalize on these supplies before pushing forward. After passing through the reopened path, you’ll collect the purple key essential for opening the door back at the intersection.
Use a jump pad to quickly return to the key intersection, then unlock the purple door. You’ll traverse corridors until arriving at an open chamber where a control panel unlocks your Heavy Bolter weapon. Expect another purge right after—arm yourself and clear out every enemy that surfaces. The combat here is intense, and the Heavy Bolter’s firepower dramatically changes your tactical options.
Attempting to reach the level exit triggers a trap: once the door closes, enemies ambush you and the floor beneath opens intermittently. You’ll fall through three times, each level introducing more enemies to shoot. Stay calm and keep moving to survive the descent.
At the rock-bottom depth, the final ambush awaits within the blood-drenched confines. Clear the way and reach the exit for this grueling section. It’s a test of endurance and situational awareness, making resource management crucial throughout.
Mountain of Skulls – Blood Machine
Escaping that blood-soaked pit leads you into narrow tunnels ending at a dead-end highlighted by a glowing pipe. Shooting this pipe causes an explosion, revealing a hidden passage forward—never overlook environmental cues like this, as they often conceal vital paths or triggers.
Progressing onward, a locked yellow door bars your way. To circumvent this, break the pipe above a nearby door on the left, then climb the structure it uncovers. At the summit, find the red key needed to open the adjacent red door below. Thorough examination here prevents backtracking that wastes precious time and ammunition.
This red door leads into a colossal structure reminiscent of the previous areas—exterminate foes, ascend the platform, and acquire the purple key at the top. Leap over a broken wall into a new sector where shooting two pipes unlocks access to the last massive structure. On its second floor, find the yellow key, which will activate an intense purge sequence.
This purge is brutal; leverage your full weapon loadout to survive. When it wraps, retrace your steps through the first yellow door back to the original zone.
Beyond the second yellow door awaits the area’s climax: the legendary Lord of Skulls boss fight. This encounter spans three phases, with your earlier sabotage of pipes weakening the behemoth’s defences. Understanding when and where to strike is critical, as is evading his devastating shockwaves and area attacks.
In phase one, focus on destroying all glowing components. Watch for his axe swings that create shockwaves requiring timely jumps to avoid. Once the glowing parts and the Lord’s health bar are depleted, a door opens to your right.
Inside this new section, shoot the two massive blood tankers located behind the boss. Move forward through waves of lesser enemies, then use a jump pad to scale the Lord’s back and target the glowing weak spot behind his head. When struck, he violently throws you back into the arena marks the start of the fight’s second phase.
This phase introduces a fearsome blood spray attack from a chest wound. Leap over the streams to avoid damage while picking off his axe, hand, and chest armor to drain his life. Each successful hit edges you closer to victory, demanding precise timing and spatial awareness.
After defeating this section, proceed through the newly opened door on your left, destroy the last two blood tankers, and use the jump pad once more to attack the critical weak spot. The Lord hurls you back one final time; his head is now vulnerable. Aim everything at this weak point. With persistence, you’ll finally bring down this mountain of death.
Slay the Lord’s head to complete the chapter and celebrate as Planet Novoza falls under your eradication. This gritty, relentless chapter perfectly captures the unforgiving nature of Warhammer 40K Boltgun 2.
That wraps up the Mountain of Skulls. A test of stamina and strategy, it leaves a lasting impression and sets the stage for what comes next.
For those craving more detailed walkthroughs of Warhammer 40K Boltgun 2, keep an eye out for future deep-dives covering the game’s brutal, rewarding campaign.
Whether you’re running through chaotic firefights or navigating cramped tunnels, Mountain of Skulls reminds you why every corner in this game is a challenge worth conquering.