Containment Block Helmholtz walkthrough: Level 3 clearance, X-ray barrier, and security reset

Route scope and preparation

This route begins in Containment Block Helmholtz on the third floor of the Cascade Laboratories containment cells. It crosses the live-fire turret gap, completes the Furniture Store portal world, opens the four-Essence X-ray checkpoint, and reaches the Control Center security reset. Furniture Store is the portal world inside Helmholtz; it is not another name for the block itself.

Prepare by stage so a failed attempt does not strand every important item:

An X-Ray Tower is the normal route to the first Leyak Essence. If you plan to craft the portable X-Ray Lamp, collect five Essences in total: one is consumed by the Lamp recipe and four remain for the checkpoint. If you keep using the Tower, only the four checkpoint Essences are needed.

Stage 1: reach and cross Helmholtz

Containment Block Helmholtz is reached from the containment-cell area in Cascade Laboratories. The block is marked by high-security doors and defense turrets intended to contain the Zombies inside. Follow the level-3 route until the broken walkway and live-fire section are visible.

The conservative crossing uses three Bridge (Wood) pieces to span the gap while the player remains out of the direct firing lane. A shield or vehicle can also cross according to the linked walkthrough, but both expose the player to more turret fire and add no advantage to a first clear.

1. Clear inventory space for the bridge pieces before entering the firing area.
2. Place from cover and confirm each segment is supported before stepping out.
3. Cross once, then open the route toward the Furniture Store portal.
4. Do not dismantle the crossing until the facility shortcut after the portal section is active.

The success condition is not merely reaching the far side. The route must still support a recovery trip if the Furniture Store or checkpoint attempt fails.

Stage 2: solve the Furniture Store correctly

The portal in Helmholtz leads to the Furniture Store. Its five buttons are randomized from known possible locations each time the world is entered. Leaving and re-entering reshuffles them and clears the earlier button progress.

No Zombies spawn inside before the first button is pressed. The first press starts spawning, and each additional button raises the spawn rate. Use the quiet phase rather than turning the first button into an accidental combat timer:

1. Find the central elevator and scout the basement, ground floor, and upper floor with the Headlamp and Flashlight.
2. Locate all five active buttons before pressing any of them. At least one appears on each floor in the current source description.
3. Return to the basement and run the known button locations upward.
4. After button five, go directly to the central elevator instead of looting during the highest spawn pressure.
5. Ride to the top floor, use the Email Terminal if desired, and leave through the exit portal.
6. Back in the facility, clear immediate enemies and activate the nearby elevator shortcut before continuing deeper.

If the group wants furniture, package the planned items during the quiet scout and stage heavy loot in the elevator. The separate Furniture Store route covers repeat runs; this page keeps the first visit focused on opening the Control Center path.

Stage 3: prepare four Leyak Essences

The X-ray checkpoint beyond the Furniture Store route accepts four Leyak Essences. Examine the X-Ray Shield Emitter control panel at the Control Center entrance to unlock the X-Ray Lamp recipe. The X-Ray Tower recipe comes from a different object: the x-ray emitter outside the Leyak containment cell in XR Containment.

Normal weapons are not the collection method. A Leyak can be made to disappear by sustained unobstructed observation, but the X-ray devices are what make it drop the Essence needed here. The Tower can affect a Leyak through a wall when the target enters its reach, which makes a powered base installation safer for the first collection.

Leyak Essence emits extreme radiation after a player picks it up. The current item source recommends a Hazardous Materials Suit or Rat Suit, and notes that a Research Pack can reduce exposure while carrying it. An untouched Essence does not emit radiation until it has been picked up. Use proper protection, move the four items as one planned checkpoint trip, and do not invent a universal safe carry time.

Insert all four Essences at the X-ray checkpoint to turn off the machine and open the Control Center approach.

Stage 4: reach the security reset

The area after the checkpoint still contains live turrets and Order enemies. The linked walkthrough's stable landmarks are more useful than a blind sprint:

1. Begin on the lower floor and use the right-side wall to limit exposure.
2. Pull nearby enemies back toward cover when possible rather than fighting in the open turret lane.
3. Cross toward the elevator and move to the upper floor.
4. Use pillars and kitchen counters as cover while approaching the two snipers.
5. After the snipers are cleared, follow the hall with the bodies and climb the stacked suitcases.
6. Interact with the security-system reset control at the top.

Resetting security removes the live-fire obstacle from this progression route. Do not treat that as proof that every enemy in Cascade Laboratories has vanished; finish the immediate sweep before opening inventory or moving base supplies.

Recovery checkpoints

Completion checklist

• The bridge route crosses the Helmholtz turret gap.
• All five Furniture Store buttons were found before the first was pressed.
• The top-floor exit was used and the facility elevator shortcut was activated.
• Four protected Leyak Essences were inserted at the X-ray checkpoint.
• The lower-floor wall, elevator, upper-floor cover, and suitcase route were followed to the security reset.
• The reset control was activated and the return route was checked before the group moved on.

For the collection step in more detail, use the Leyak Essence farming guide. For portable and stationary X-ray placement, use Leyak, Phantom, and X-Ray Lamp.