The Aqueduct shortcut, every cosmetic and mode unlock, off-path ember locations, and everything the game never tells you directly. Updated for v1.15.
Every reward the game gives you, and what you must do to earn it. There is no New Game+, no experience system, and no random drops — everything is tied to mode completion.
| Requirement | Type | What you unlock | Notes |
|---|---|---|---|
| Complete Normal | Mode | Nightmare mode | Unlocks from main menu after credits |
| Complete Normal | Ending | The Stone Ending | Normal's conclusion — you turn to stone |
| Complete Nightmare | Mode | First Kiln mode | No checkpoints, 4 Murderpedes |
| Complete Nightmare | Mode | Nightmare (Inverted) | Added in v1.14 — map flipped vertically |
| Complete Nightmare | Ending | The Hollow Ending | Nightmare's conclusion — the illusion dissolves |
| Complete First Kiln | Cosmetic | Ashen Hook | Ash-coated hook skin, purely visual |
| Complete First Kiln | Mode | First Kiln (Inverted) | Hardest mode in the game — devs haven't cleared it |
| Complete First Kiln | Ending | The True Ending | Viper's Pit text — you do not turn to stone |
The Aqueduct is the only major hidden route in Idols of Ash. Most players descend the main open-shaft section of the mid-structure and never see it. It is not marked, not hinted at in lore, and easy to miss at speed — but it bypasses one of the longest and most open sections in the game.
The Aqueduct entrance is in the mid-section, after the third Ash Urn checkpoint (the one positioned beside a cracked stone arch). Instead of continuing down the main central shaft, look for a left-side wall opening — a narrow horizontal passage partially obscured by debris geometry. It is at roughly the same depth as the checkpoint, roughly 8–10 meters to the left.
At maximum brightness the opening is visible as a rectangular gap with a faint green shimmer — likely a vitality shard placed just inside by the level designer, acting as an unintentional breadcrumb.
After touching the third Ash Urn, do not drop into the main shaft. Swing left along the wall. The entrance is a horizontal gap about 2 player-widths wide. Grapple to the left wall and let momentum carry you in.
The Aqueduct is a narrow water channel running diagonally down-left through the mid-structure. The ceiling is low — full swings are not possible. Use short controlled grapples off the side walls, and let the floor slope carry you. Do not try to speed through it; the geometry will catch you.
In First Kiln, there are three embers grouped in the middle section of the channel — the highest concentration of healing in any off-path location. If you enter the Aqueduct at low health in First Kiln, this is the primary reason to take it.
The channel exits through a vertical drop into the lower mid-section — below where the main path would have deposited you. You rejoin the main descent about 2–3 platform clusters further down, bypassing the wide open shaft entirely.
The Ashen Hook is currently the only cosmetic in Idols of Ash. It is unlocked by completing First Kiln mode for the first time.
A blackened, ash-coated version of the grappling hook — visually matching the game's stone and ash aesthetic. The hook head is dusted with grey ash, the chain is darkened, and the release motion has a faint particle trail. It is purely cosmetic: no changes to swing speed, range, retraction speed, or any mechanical stat. Equip from the main menu cosmetics screen.
No other cosmetics currently exist. There is no cosmetic for Nightmare completion, no alternate player skins, and no equipment items that affect gameplay. The Ashen Hook is the game's only visible reward for endgame completion, making it a meaningful marker for experienced players.
Inverted variants of Nightmare and First Kiln were added in the v1.14 update. They are not simply mirrored — the entire megastructure is flipped vertically, so everything you know about spatial orientation is actively wrong.
The Nightmare ruleset — faster AI, fewer checkpoints, no lore pauses — applied to the vertically flipped structure. Your Normal route memory becomes a liability. Expected to add 20–40 minutes to an average Nightmare run time for players already familiar with the base mode.
The hardest mode in the game. No checkpoints, four Murderpedes, near-total darkness in the final area — all in a flipped structure you have never seen in this orientation. The developers have stated they have not cleared this mode themselves. It exists for the community.
The vertical flip is applied to the entire level geometry — platforms, wall positions, and the path itself are mirrored on the vertical axis. You still descend (the game's down direction does not change), but what was the left wall is now the right wall, and vice versa. Platform clusters that appeared above you are now visually below.
The Aqueduct entrance moves to the right side in Inverted mode. Checkpoint positions remain at the same depth in the structure but are now on the opposite side from where you expect them. The Murderpede pathing is recalculated for the new geometry, so chokepoints that were safe in normal orientation may not be safe inverted.
Your brain's muscle memory from non-inverted runs is your primary enemy. Experienced players consistently report that their first few Inverted runs feel slower than their very first runs on Normal — because the wrong spatial instincts fire constantly.
In First Kiln, the standard vitality shards found in Normal and Nightmare are replaced with embers — scarcer healing that restores more health but requires detours to find. Most are on the main path. The following are the ones that require intentional deviation.
Aqueduct cluster (3 embers): Grouped in the middle section of the Aqueduct hidden route. The most significant off-path healing in the run. Worth a detour if health is below 50% before entering the lower mid-section.
Third checkpoint ledge underside (1 ember): Beneath the platform that holds the third Ash Urn (which is inactive in First Kiln — no saving). Grapple to the underside of the ledge to collect it. Easy to spot at max brightness but easy to miss during a fast descent.
Lower depths crevice (1 ember): In the lower depths section, a narrow horizontal crevice in the right wall (left wall in Inverted) contains a single ember. Requires entering the crevice briefly — there is enough room to grapple back out. The Murderpede cannot follow you inside.
Pre-dark section alcove (2 embers): Immediately before the lights go out in the final section, there is an alcove on the left. At full brightness these two embers are visible. Collect them before entering the dark — you cannot reliably find them once the final section begins.
Nothing is permanently missable. All mode unlocks persist, all cosmetics remain available once earned, and the Aqueduct is present in every run (it does not require unlocking). You can replay any mode at any time.
Yes. If you completed Nightmare or First Kiln before the v1.14 update, the Inverted modes do not unlock retroactively. You must complete those modes again on v1.14 or later to receive the Inverted variants. This is a known limitation the developer acknowledged when the update shipped.
No. Purely visual. Swing arc, range, retraction speed — nothing changes. It is a prestige cosmetic for completing the hardest standard mode.
The Aqueduct is the only confirmed hidden route with a meaningful gameplay impact. There are some alcoves and side passages throughout the structure, but they lead only to ember pickups or dead ends — none bypass significant sections the way the Aqueduct does. The community has mapped the structure extensively and no other major shortcuts have been found.
No. The Inverted modes are the closest equivalent — a harder revisit of familiar structures. There is no experience system, no unlockable upgrades, and no persistent carry-over between runs. Each run starts with the same baseline character.