Warhammer 40,000: Boltgun is the latest addition to the Warhammer 40k franchise's long list of games set in the venerable grim dark universe. Taking on the role of a lone Space Marine, the sole survivor of an unsuccessful drop, players must cleanse the Forge World of Graia from the evil influences plaguing it. One talented and determined Space Marine against the malicious Forces of Chaos; seems an even match until one discovers how numerous and deadly the daemons and cultists infesting the planet are.
On the surface, Warhammer 40,000: Boltgun tasks players to do the impossible. However, this retro shooter-inspired Warhammer 40k title offers the Space Marine many boons in the form of Relics and Special Ammo, hidden away Secrets. These powerups can make all the difference and demand only for a player to seek them out, which proves challenging as some lie behind unobvious nooks and doors masquerading as ordinary walls. This guide will save players trouble by revealing every Secret in Chapter One, Missionss 1-4.
Mission One - Off Target (Secrets: One)
Secret One - Assault Doctrine
After crashlanding on Graia, players must progress through the mission, ripping and tearing through hoards of lowly enemies and going through the short learning portion of Warhammer 40,000: Boltgun. They will eventually happen upon a shrine room containing the revered Boltgun; after acquiring it, they must go to the end of the room and drop down a long shaft.
Upon reaching the bottom, they must slay some cultists, push a button, and enter the next room.
Unsurprisingly, waiting in the next room are more enemies, which the player must make quick work of before entering the next room ahead.
Immediately entering the seemingly empty room will cause a purge protocol, so players should stop in the doorway and quickly head to the corner directly to their right.
There, they will find a portion of the wall bearing a symbol of the Adeptus Mechanicus. Players must approach this wall. Doing so reveals this to be a door that they can open.
Opening the disguised door reveals the Secret, an Assault Doctrine Relic players can use to annihilate enemies effortlessly with their Chainsword during the Purge Protocol.
Mission Two - Mountain Batteries (Secrets: Six)
Secret One - Emperor's Visage
Upon starting Mountain Batteries, players must progress through the mission until they pass the Red Door with a Red Key and ascend to the top of the building, where they will find a window overlooking an area below; they must drop down.
Once they do, cultists will greet them with the hospitality of the Ruinous Powers. After slaying their foes, players must head to the gate of the towering wall to their right.
There, they will find a button that opens the gate before them. Players must press it, opening the gate and revealing an area plagued by cultists and Chaos Space Marines.
Defeating these enemies will be somewhat challenging, but once slain, players can head to the back of the area, near the cliffside, where they will find the Emperor's Visage Relic — a powerup granting them 300 Contempt, a staggering defense against the Forces of Chaos ahead.
Secret Two - Munitions Boon
Continuing from Secret One, players will move until they come upon the area boasting two massive guns, Quake Cannons.
There will be many enemies in this region that players must either vanquish or evade to reach the ramp to the left. Players must ascend the ramp and deal with the few heretics atop.
Players will reach a portion with a building ahead and a path to the left, but rather than continue forward, they will jump from atop the rock to the left, then from there to the one on the right.
Atop the rock, players will see a platform across, with yellow paint marking its edge. They must jump to this platform.
Adorning the center of this platform is the Munitions Boon Relic, a powerup increasing the ammo capacity of every weapon, which is especially beneficial for guns with small magazines, like the Meltagun.
Secret Three - Machine Spirit
Heading down to the area they were in before ascending the ramp, players will see a tall building to their right. They must head there.
Players will find a door they can open with the button, granting them entry to the building.
They must ascend to the top of the building to the uppermost room, which holds the Machine Spirit Relic, a powerful powerup that grants a unique upgrade to the weapon equipped by the Space Marine.
Secret Four - Vortex Grenade
After acquiring the Machine Spirit, players must approach the wall directly ahead. Doing so reveals this unimpressive wall to be a door in disguise.
Interacting with the wall will cause it to lift, revealing the Vortex Grenade Relic, a reality-bending explosive that draws enemies and barrages them with the destructive power of the Warp.
Secret Five - Aura Of Doom
Heading down to the area outside the building entrance, players can see a structure between the Quake Cannons across from them.
Players must tackle hoards of cultists and several Chaos Space Marines to reach this building; they can take either the left or right path to it.
Reaching the building, players will find several enemies guarding the Aura of Doom Relic, a powerup that increases the damage they inflict and reduces the damage they take.
Secret Six - Kraken Rounds
Players will continue progressing the mission until they happen upon the area infected with muck and Plague Toads.
They will then head to the platforms on the right and climb up them, eliminating obstructing enemies in their way.
Upon reaching the top, players will see a platform across from them that they must jump to.
Doing so brings them to a pillar of stone holding Kraken Rounds, Special Ammo for the Boltgun that fires much faster than the usual ammunition.
Mission Three - Sector Imperialis (Secrets: Seven)
Secret One - Munitions Boon
Upon starting Sector Imperialis, players will progress through the mission until they reach the Red Door.
They will head right from the Red Door until they reach the end, where a building with a green banner sits.
Players will round the corner of this building and head down the rubble-covered path to the end.
They will find a path to the right, taking them directly to the Munitions Boon Relic.
Secret Two - Emperor's Visage
Players will head to the green banner building they saw before and enter it, heading to the top floor.
Progressing through the building will take players to a room displaying the Shotgun in its center.
After taking the Shotgun and dispatching several enemies, players must head to the opening to the right, where they will find the Red Key and the Emperor's Visage Relic across atop the head of a statue. Getting the powerup requires players to leap and clamber on the statue's head.
Secret Three - Kraken Rounds
From there, players will head to the Red Door and open with the Red Key, progressing through the mission normally.
Players will eventually reach an area with an Adeptus Mechanicus symbol and two paths, one to the left and the other to the right.
They will head left until they reach a fortified structure at the end bearing enemies.
After eliminating the heretics within, players must enter the structure and follow either of its paths to the back, where they will find Kraken Rounds.
Secret Four - Machine Spirit
Players will then head to the opposite path and follow it till they reach a structure matching the one they were in before.
They will clear the enemies within, enter it, and follow either path to the back, where they will find the Machine Spirit Relic.
Secret Five - Vortex Grenade
Players will progress through the mission as usual, unlocking the Purple Door with the Purple Key and moving forward.
Soon, they will reach an elevator descending into an arena-like area, initiating a Purge Protocol.
Players must jump across to the staircase directly opposite of the elevator and follow it up.
Atop the staircase is a seemingly empty space, but should players approach the unsuspicious walls to their right, they will discover there is more than apparent.
They will find a smoother section of the wall, which, if they approach, reveals itself to be a door that they can open by interacting with it.
After the door grinds open, players will find a small room with the Vortex Grenade Relic within.
Secret Six - Aura Of Doom
Across from the hidden door, down below, players will see a broken bridge.
Leaping to it allows players to reach the Aura of Doom Relic sitting atop the ruined bridge.
Secret Seven - Dragonfire Rounds
From the same ruined bridge, players can see a building with no obvious way of reaching it.
They must leap from the bridge to the protruding edge of the building and carefully follow it around to the opening.
They will enter the building and, behind a column, will be Dragonfire Rounds, Special Ammunition that causes a fiery death for enemies covering a wider area.
Mission Four - Silent Martyrs (Secrets: Six)
Secret One - Machine Spirit
Upon starting Silent Martyrs, players will progress through the mission as they would and seek out the Red Key for the Red Door. It is in a room on the upper levels of the towering purple building directly across from where players start; the door to the room will be closed initially, but it will open when approached, unleashing a swarm of Nurglings. Players must take out the lesser daemons and collect the Red Key.
Once they grab the Red Key, players must leave the room and drop down to the lower levels of the area from the bridge. Underneath the bridge, directly under the room players were just in, they will find a doorway to a space previously locked tight. They must go inside.
Following the tunnel down leads players to the Machine Spirit Relic, a surefire way of making the Boltgun even more powerful, with some Health and Contempt along the way.
Secret Two - Munitions Boon
From here, players must exit the room and make a left once they are outside.
Heading this way will bring them to the Purple Door, but they need not worry about it now. Instead, they will turn their attention to the space left of the door.
At first, it seems there is nothing more than sandbags, braziers, and a crate, but there lies the Secret.
Heading toward the crate and observing it further reveals an opening, inside of which is the Munitions Boon Relic, a beneficial powerup regardless.
Secret Three - Vortex Grenade
Players continue through the mission, searching for the Purple Key needed to unlock the Purple Door. This search will take them through the muck-filled catacombs past the Red Door.
Meandering through the catacombs will bring players to an area infested by Nurglings and Plague Toads. After dealing with these disease-infested foes, players must head to the barred structure in the center of the room; they will find the Purple Key within.
Left of the Purple Key, players will find a path illuminated by a purple light. Following this path leads them to a Purple Door, which they must unlock.
Unknowingly, players reveal the Secret by unlocking this door. They must head straight across from this Purple Door to a set of descending stairs leading to a now open doorway.
Going down the stairs and into the room brings players to the Vortex Grenade Relic, which is more than enough to deal with whatever foes the Ruinous Powers throw at them.
Secret Four - Dragonfire Rounds
Players must continue progressing through the mission to find the next Secret, bringing them to an arena-like area with several magnificent statues. They must be wary, as a Purge Protocol will initiate sometime after players arrive.
From this point, players must head toward the building with the circular window. They must go up to the balcony-like area littered with sandbags, barricades, and crates, which seem inconspicuous initially.
However, investigating this mound of war supplies reveals an opening in a crate to the left; sequestered inside are Dragonfire Rounds — devastating bullets that can tear through hordes of Nurglings.
Secret Five - Aura Of Doom
Players can collect the Yellow Key and continue through the Yellow Door nearby, progressing the mission until they reach an open arena-like area with a massive statue flanked by columns in the center. Entering this space will initiate a Purge Protocol, where players are pitted against the Forces of Chaos.
On the ruined bridge overshadowed by the central statue, players will find the Aura of Doom Relic.
Secret Six - Kraken Rounds
From their current position on the ruined bridge, players must descend the flight of stairs to their left to the bottom floor.
Here, they can see two doorways in the corner of the area heading elsewhere. Following either will lead players down a set of stairs to a room not too far below.
In the center of this room lies crates, ammunition, and, of course, the infamous Kraken Rounds that can aid players during the Purge Protocol.
Warhammer 40,000: Boltgun is available for PC, PS4, PS5, Switch, Xbox One, and Xbox Series X.