How to unlock First Kiln, survive four simultaneous Murderpedes, navigate the pitch-black final section, and reach the true ending. The hardest content in the game — explained completely.
First Kiln is Idols of Ash's endgame mode — unlocked after completing both Normal and Nightmare. It is not simply a harder version of the same map. It introduces a new layout (including the secret Aqueduct sections), replaces the single Murderpede with up to four simultaneous instances, removes all Ash Urn checkpoints, and ends in a pitch-black final chamber.
Completing it triggers the game's only true ending — the Viper's Pit text — and is the only outcome where the protagonist does not turn to stone.
There is no shortcut. Idols of Ash First Kiln requires completing both preceding modes in sequence.
Reach the bottom of the megastructure on Normal difficulty. Read the lore at Ash Urns — the game's story context makes the First Kiln ending land significantly harder if you understand why you descended. Normal takes 20–60 minutes and unlocks Nightmare mode plus the Stone Ending.
Reach the bottom on Nightmare. The Murderpede is faster, checkpoints are fewer, and gaps are tighter. Do not stop to read lore — the creature will catch you. Memorize the route from Normal and execute it cleanly. Completing Nightmare unlocks First Kiln plus the Hollow Ending.
After clearing Nightmare, First Kiln appears in the mode select screen. It begins immediately with no tutorial — in v1.15 Nightmare and First Kiln skip the tutorial section entirely, dropping you straight into the descent.
Players who cleared Nightmare often underestimate Idols of Ash First Kiln because they expect it to be "just harder." It is structurally different in ways that require completely different strategies.
| Attribute | Nightmare | First Kiln |
|---|---|---|
| Murderpede count | 1 (occasionally 2) | Up to 4 simultaneously |
| Checkpoints | Reduced — still present | None — death resets entire run |
| Healing | Ash Urns + vitality shards | Embers only (no urns) |
| Map layout | Same as Normal | New sections including Aqueduct maps |
| Final section | Dim but navigable | Pitch black — requires max brightness |
| Audio complexity | One threat signal to track | Four overlapping signals — requires triage |
| Ending | Hollow ending (Green Woman dissolves) | True ending — Viper's Pit text |
| Tutorial skipped? | Yes (v1.15+) | Yes (v1.15+) |
Idols of Ash First Kiln's layout is distinct from Normal and Nightmare. The following breakdown covers the major sections you will encounter. Click each phase to expand the detailed guide.
First Kiln begins immediately — no tutorial camp, no initial safety. You start at the top of the structure in full pursuit conditions.
Primary goal: Establish downward momentum as quickly as possible. Do not hesitate at the starting position. The first Murderpede instance is already tracking you.
Key decision: The opening section has two visible routes — a wider central shaft and a narrower passage to the left. The central shaft is faster but more exposed. The left passage provides brief structural cover but adds distance. For a first clear, take the central shaft and move fast.
Sound check: Within the first 30 seconds, assess which direction the chittering is loudest. If it is already high-pitched, you need to accelerate immediately. If it is slow and distant, you have a brief window to assess your route.
Roughly one-third of the way down, a second Murderpede instance begins pursuing from a different entry point — typically from the side rather than above. This is where First Kiln's audio triage system becomes essential for the first time.
Audio triage: You now have two signals. Identify which is louder. The louder signal is closer. Route away from the closer threat first, then factor in the second. If both are equally loud, take the most direct downward route and accept that one will close in briefly.
Ember locations: The mid-section contains the first embers. Do not collect unless you are below 50% health — the positions are deliberately awkward and collecting them costs momentum.
The Aqueduct entrance: Look for a partially hidden gate near the central structural pillar. This opens to the Aqueduct — a water-logged alternate section that moves faster but is significantly more complex. Experienced players use it; first-time clearers should stick to the main route.
The Aqueduct is a secret alternate path through water-logged sections of the megastructure. It was referenced in community descriptions as "faster but far more dangerous" — this is accurate.
Advantages: Significantly shorter route to the lower sections. Water physics slightly alter grapple momentum in ways that can be exploited for faster descents once understood.
Disadvantages: The geometry is far more complex than the main route. Visibility is lower. The Murderpede's pathfinding through the Aqueduct is less predictable — it may arrive before you expect.
Recommendation: Skip it on your first clear attempt. Learn the Aqueduct route only after you have already beaten First Kiln once and want to optimize run time.
In the lower two-thirds of the structure, the third and fourth Murderpede instances enter from below and the sides respectively. This is First Kiln at full intensity — four overlapping audio signals from four directions.
The key insight: Four Murderpedes approaching from all directions means there is no perfect route — only routes that are better or worse relative to the current threat positions. Accept that at least one will get close. The goal is to ensure the closest one never quite reaches contact.
Chokepoints: The lower section has three narrow gaps that all four instances compete to control. If you hear very loud clicking from directly below one of these gaps, it is guarding the hole. Find the alternate gap — there is always at least one other vertical passage in the same section.
Health management: If you reach this section below 30% health, the risk profile changes. Prioritize ember collection even if the positions are awkward — contact at this depth with low health ends the run.
The final section of First Kiln is completely unlit. This is not "dark" in the way earlier sections are dark — it is a total absence of ambient light. Without maximum brightness settings, it is effectively unnavigable.
Before you enter: If you have not already set both monitor brightness and in-game brightness to maximum, do it now. There is a brief structural transition before the lights cut out — use it.
Navigation cues in total darkness: Platform silhouettes against slightly less-dark backgrounds. The faint ember glow from healing collectibles. The sound of the Murderpedes' leg scraping — which direction it comes from tells you where the walls are as much as where they are.
Movement strategy: Short controlled drops rather than long swings. In darkness, a long swing that lands wrong sends you into a void you cannot see coming. Fire the hook to a known surface, control the descent, land, reassess, repeat. It is slower but survivable.
The final floor: When your feet touch the ground of the lowest chamber, the run is effectively over. The ending text appears. You do not need to do anything else.
Both monitor brightness and in-game brightness slider should be at maximum before your run begins. The dark final section arrives without warning, and fumbling with settings while four Murderpedes close in is a run-ender. Do it before you click Start.
No checkpoints means a contact hit at 90% health and a contact hit at 10% health have the same long-term risk — both set you on a path toward a run-ending death with no safety net. Play conservatively at any health level, not just when critically low.
If you cannot reliably identify the direction and relative distance of one Murderpede by sound alone in Nightmare, you are not ready for four in First Kiln. Spend time in Nightmare specifically practicing directional audio identification before moving up.
Speedrunners take aggressive lines through First Kiln because they have memorized every section. On a first clear attempt, take the widest, clearest path available at every decision point — even if it looks slower. A slow clear counts. A fast death does not.
When two or more Murderpedes are converging simultaneously, a sharp upward climb of 4–6 seconds causes all their pathfinding to recalculate. Use this window to identify the clearest downward route, then commit to it immediately.
Discord video, browser tabs, screen recorders — all compete for GPU and CPU resources. A frame rate drop in the dark final section at full Murderpede pressure has ended many runs. First Kiln deserves a clean machine. Close everything before you start.
The Aqueduct is faster for players who know it. It is a run-killer for players who do not. Take the main route on your first clear — learn the Aqueduct geometry on subsequent attempts when the pressure of a first completion is off.
There is always an alternate vertical passage in the same section. It may be narrower or less obvious, but it exists. Waiting for the Murderpede to move is not a viable strategy — it will not move voluntarily. Find the secondary route and take it.
Idols of Ash First Kiln removes the Ash Urn checkpoint and healing system entirely. In its place: embers — small glowing collectibles scattered through the structure that restore a portion of your health when collected.
Vitality shards (the healing orbs in Normal and Nightmare) are placed in relatively accessible positions. Embers in First Kiln are deliberately placed in awkward, risky locations — on ledge undersides, in narrow crevices, near chokepoints that the Murderpede may occupy. Collecting them requires a brief positional detour that costs momentum and potentially exposes you to threat.
Below 50% you are one bad fall or one contact hit from a very dangerous situation. The momentum cost of collecting an ember is worth the health recovery at this threshold.
At 75%+ health, the positional risk of reaching an ember outweighs the benefit. Leave it — you may need that position to be clear of Murderpede threat when your health actually drops. Collecting it now means it is gone when you need it later.
Unlike Ash Urns, embers only restore health. They do not create a checkpoint. Collecting every ember in the run and then dying still resets you to the top.
The final section of Idols of Ash First Kiln — the Viper's Pit — has no lighting. This is the section that stops the most players who have otherwise survived the rest of the run. Here is everything that helps.
At maximum monitor and in-game brightness, the total darkness becomes navigable — not comfortable, but survivable. You will be able to make out platform silhouettes as slightly different shades of near-black, the faint orange glow of ember collectibles, and the bioluminescent outline of the Murderpede itself — which is both a navigation hazard and a useful landmark for where not to go.
In darkness, a long swing that goes wrong is unrecoverable — you cannot see where you are going to land. Fire the hook to a surface you can see, control the descent, land, pause one second to visually reorient, then move again. Slow and methodical beats fast and blind.
The structural center of each section in the dark final area produces a subtly different echo on the ambient audio. When you hear the Murderpede's chittering equally in both ears, you are roughly centered — which is where the main vertical shafts are located.
The Murderpede glows faintly in the dark. This is not just a horror effect — it tells you where platform edges and walls are by negative space. Watching where it cannot go tells you something about the geometry even in total darkness.
When you can see a shaft or gap below you, aim for the exact center rather than the edge. Edge misses in the dark drop you into unknown geometry. Center hits give you the most margin for error when you cannot see what is below.
The moment your feet contact the lowest floor of the Viper's Pit, the run is complete. The screen fades and the ending text appears — you do not need to perform any additional action. If you can feel the ground, you have already won.
Reaching the bottom of First Kiln displays the only text the game offers as a "true" resolution:
"You have stepped through Viper's pit and in doing so we slid a truth from the depths. There were no answers here, only those within yourself."
— First Kiln true ending text, Idols of Ash
Unlike Normal (you turn to stone) and Nightmare (the Green Woman dissolves, you stand alone), this ending does not consume or destroy you. You do not become an Idol of Ash. You survive — not by finding a cure, but by discovering that there was no cure to find, and continuing anyway.
For the full breakdown of what this text means — the Viper's Pit symbolism, how it recontextualizes Normal and Nightmare, and the community's interpretations — see the endings explained page.
Completing Idols of Ash First Kiln unlocks First Kiln (Inverted) — added in v1.14. The map is flipped upside down. You still descend toward "the bottom" — but the bottom is now visually at the top. Every piece of spatial memory you built in standard First Kiln works against you.
If you clear standard First Kiln and want to attempt Inverted: rebuild your mental map from scratch. Your muscle memory is not just useless — it is actively harmful. Every instinctive move you have developed is now wrong. Approach it as a completely new game.
A visual reskin of the grappling hook in an ash-grey colorway. Purely cosmetic — no mechanical difference. Awarded automatically on clear.
The Nightmare map flipped upside down. Unlocked by completing First Kiln. Difficult but more manageable than First Kiln (Inverted).
The hardest mode in the game. Four Murderpedes on an upside-down map with no lighting in the final section. The developers have not cleared it.
The Viper's Pit text. The only outcome in the game where you survive. The only version of the story where the descent had a resolution other than becoming an Idol of Ash.