Liminalcore Guide: Chapter Order, Hidden Rooms, and All Achievements

Liminalcore is not a conventional puzzle game with inventory combinations or a horror game built around combat. It is an exploration-led descent through Poolrooms, fractured memories, impossible stairs, and increasingly hostile-looking spaces. The useful kind of walkthrough is therefore a route framework: how to read the environments, which chapter to play next, where optional detours tend to hide, and what to clean up before you leave a distinctive area.

This guide covers the current five-chapter route, the Chapter 3 expansion, Chapter 5 access, all 15 Steam achievements, practical settings, and a low-friction cleanup plan. It separates confirmed behavior from community-location hints where the surviving text is less precise.

Quick Answer: What Order Should You Play the Chapters?#

For the current expanded version, use Chapter 1 → Chapter 2 → Chapter 3 → Chapter 5 → Chapter 4 if you want the story-oriented order documented by the complete walkthrough reference. The numbering looks strange because Chapter 5 was added later and is unlocked from Chapter 3. The developers’ Steam announcement explicitly confirms that Chapter 5 unlocks after Chapter 3, while the official store description still treats Hell in Chapter 4 as the final destination.

A later developer update added an Unlock All Chapters option for returning players, so you do not need to replay Chapter 3 merely to reopen Chapter 5 on a current build. New players should still follow the natural unlock path rather than jumping among chapters: environmental details make more sense when seen in sequence.

Before Starting: Settings and Save Advice#

• Toggle the VHS filter if visual noise hides doorframes. The store description confirms that the filter can be switched on or off. It changes presentation, not the intended route.
• Use the movement-speed option if repeated hallways feel slow. This was added with the Chapter 3 expansion update and is especially helpful during achievement cleanup.
• Lower Lumen quality before lowering everything else. The developers added a Lumen quality option and later shipped texture and performance fixes. Stable lighting matters in dark corridors because many transitions are found by silhouette rather than signage.
• Let Steam Cloud finish syncing. Cloud saving was added in a later update. The available official material does not document a traditional manual save-slot system, so treat chapter boundaries as your safest stopping points.
• Do not wait for weapons. Official material describes rare entities and an exploration focus, not a combat loop. A threatening room is usually asking you to move, observe, or commit to a drop.

The Navigation Rule That Prevents Most Lost Runs#

Repeated tiles are meant to erase your sense of progress. Trying to remember every turn is unreliable. Instead, use a simple three-pass method whenever a space opens up:

1. Read the perimeter first. Walk one complete edge of the room and note every dry doorway, stair, ladder, slide, unusual light color, and deliberate hole.
2. Test the obvious exit second. If it loops to the same landmark, stop treating the space as a maze and start looking for a state change: a fall, a newly visible opening, a different water level, or a room you previously passed without entering.
3. Sweep optional doors before the one-way transition. Slides, deep drops, long stair descents, and sharply different color palettes often mark commitment points. Finish local achievement checks before using them.

Use physical landmarks rather than directions. “Return to the room with the single oval wall light” survives a perspective change; “take the third right” does not. If you are cleaning up achievements, keep a tiny note with three columns: landmark, side rooms checked, and one-way exit used.

Chapter 1 Route: Level 37 and the Poolrooms#

The opening chapter establishes the game’s visual language. White tile and shallow water can make every branch look equally important, but the route continually contrasts safe architecture with deliberate absence. Lit arches and constructed stairs usually advance the main line; black water, broken edges, and impossible scale are where optional triggers live.

Recommended pass

1. At each new pool chamber, circle the dry edge before entering the water. You are looking for a doorway or stair whose lighting differs from the room you just left.
2. When the route offers an obvious void or reset drop, use it once instead of assuming it is only a death plane. This is the direct cleanup opportunity for Fall Into Void.
3. After respawning, repeat safe void or reset-pool falls until Not Afraid of the Void unlocks. The readable achievement reference gives a target of ten total falls.
4. When a pool produces a suspicious sound or presence, remain there briefly. Do not immediately run for the next doorway; There is definitely something in the water is tied to waiting long enough for that encounter.
5. In the large-scale sequence, continue the descent and give the enormous object or structure time to register. The community hint describes facing the giant encounter twice. If the achievement does not appear, retrace the nearby downward path and look back at the same imposing object from the second viewpoint.
6. Continue through the clearest newly lit opening until the chapter transition completes. Wait for the Chapter 1 achievement before returning to the menu.

The most common mistake here is treating every fall as failure. In Liminalcore, a reset can be a mechanic, an achievement counter, or the route itself. Distinguish a harmless reset from a stuck state by checking whether you return with movement control and the environment remains loaded normally.

Chapter 2 Route: Faded Memories#

Chapter 2 shifts from pure Poolrooms geometry toward fragments of home, neighborhood, and personal memory. The main route remains readable if you follow the strongest visual transition. The available current cross-check places Familiar Place later in Chapter 3, so do not spend an hour forcing every Chapter 2 door for that achievement.

How to search without ruining the pacing

• Whenever a domestic or familiar-looking cluster appears, enter it for the environmental story, then continue toward the strongest change in lighting or architecture.
• Count distinct interiors, not doors. A doorway that loops into the same room should not be treated as new progress.
• No current source verifies a collectible inventory, code list, or chapter-specific hidden achievement in Chapter 2. Exploration adds context, but it is not a mandatory item sweep.
• Let the transition complete and wait for Chapter 2 before returning to the menu.

Chapter 2 is also where atmosphere can be mistaken for a chase. Rare entities may appear, but the official mechanics description still frames the game around exploration rather than fighting. Keep moving toward the environmental transition instead of searching for a weapon or interaction prompt that does not exist.

Chapter 3 Route: Infinite Stairs and the Expansion#

Chapter 3 is the point where old walkthroughs become least dependable. The developers expanded it substantially in 2025, adding new spaces, new mechanics, a Tunnel Slide, movement-speed settings, and optimizations. If a video or guide jumps from stairs directly to the end, it may show the older build.

Main route strategy

1. Follow lit landings through the Infinite Stairs sequence. At large intersections, choose the branch with a visible destination rather than the branch that merely continues into blackness.
2. When you reach the expanded section, reset your mental map. Treat the first unmistakably new prop, color, or play structure as a fresh origin point.
3. Open side doors in batches. Clear the left wall of a corridor, return to your landmark, then clear the right wall. Alternating randomly between sides makes the repeated architecture much harder to audit.
4. Watch for a hallway with three doors leading to red kindergarten rooms. This is the verified Chapter 3 landmark for Familiar Place.
5. Complete the chapter normally to unlock Chapter 3. On current progression, this is also the official prerequisite for Chapter 5 unless you use Unlock All Chapters.

Familiar Place: the three red rooms

In Chapter 3, find the hallway with three doors. Each door leads to a red kindergarten-style room with props such as toys, tables, or classroom furniture; tree imagery appears on the walls. Walk fully into all three rooms. If the achievement does not appear, cross each threshold again rather than searching Chapter 2.

Slides: do the repetition in one controlled place

The two slide achievements are cumulative. The readable community guide says any slide counts, and the developers specifically mention the Tunnel Slide in the expansion notes. Once you find a short, safe slide with a quick return path, use it repeatedly until both milestones register:

• Fond of Slides: take slides five times.
• Slippery Habit: take slides ten times.

Do not assume one dramatic slide is worth multiple counts. Complete ten actual rides. If the fifth achievement appears and the tenth does not, continue to twelve to cover a ride that may not have completed cleanly.

Chapter 5 Route: The Added Descent#

Chapter 5 was released as additional content and is officially tied to Chapter 3 progression. If it remains locked on an older save, either restart Chapter 3 from the chapter menu and complete the required path, as the original announcement instructed, or use the later Unlock All Chapters option.

This chapter is best approached as a continuation rather than a numbered sequel. Keep the same cleanup discipline from the expanded Chapter 3 spaces:

• Explore the local side rooms before using a slide or one-way drop.
• Do not leave a hub until you can name the landmark that proves you returned to its start.
• If your slide achievements are unfinished, take every accessible slide instead of assuming the counter is chapter-specific.
• When the late slide appears, finish any nearby search first. The readable achievement guide describes finding that slide as being moments from Chapter 5’s end.
• Let the end transition finish and wait for Chapter 5 to unlock before quitting.

Up Down: the infinite-floor room

Up Down is the rarest achievement in the official global-stats snapshot used for this guide. Steam confirms that the target is a room with infinite floors, while readable Chapter 5 community reports provide the location pattern:

1. Reach the Chapter 5 area with hundreds of connected rooms, blue floors, and red walls.
2. Return to its main hallway and face in the direction you originally entered.
3. Count to the sixth door on the left. Go through it, then continue approximately two rooms inward.
4. Inspect the floor in each room. One contains a large hole; jump into it to reach the infinite-floor space and trigger the achievement.

The supplied dedicated guide carries removed/incompatible warnings, but a separate readable Steam discussion independently places the hole at the sixth left door and two doors in. If your build or orientation does not match, reset at the main hallway rather than continuing to count inside the grid.

Childhood Memories in the same red-and-blue maze

Start from the same Chapter 5 main hallway. Choose a door on the left and continue straight through each connected doorway until you emerge into a hallway on the far side. Look for the long viewing window and the children’s-game scene compared by the achievement guide to red light, green light. Enter the space and look through the window instead of turning around at the threshold.

The gallery before the colored stairs

The gallery is also in Chapter 5. In the first white-door section, before the large room with many colored stairs, search the rooms behind the white doors. A second community location report describes the first corridor with three doors and points to the third or last door. The destination is modest: a room with three pictures on the wall, not a giant museum hall.

These three secrets are best handled in one Chapter 5 pass. Use a wall-following sweep, keep the main hallway as your reset landmark, and finish the side-room search before the late slide.

The available references support the chapter order and achievement anchors but do not provide a reliable text-only, turn-by-turn map for every expansion room. This guide therefore avoids inventing door numbers outside the limited Up Down clue.

Chapter 4 Route: Hell and the Ending#

The official store description presents Hell as the final destination: darker, organic, and visually hostile compared with the tiled Poolrooms. The practical change is not a new combat system; it is reduced landmark clarity.

1. Raise visibility only enough to distinguish walkable edges. Over-brightening removes the contrast that shows which opening the environment is emphasizing.
2. Use moving light, open silhouettes, and changes in wall material as route markers. A repeated dark wall is weaker evidence than a single lit threshold.
3. At apparent dead ends, turn around and inspect the approach. Several liminal-space transitions are easier to notice after the camera faces back across the room.
4. Continue through the final sequence without returning to the menu. Wait until the end state awards Chapter 4.

No supplied or official source verifies a separate ending choice, code, collectible currency, or missable item set here. The safe goal is completion, not a fabricated “true ending” route.

All 15 Steam Achievements#

The names and descriptions below were checked against Steam’s public achievements page. Methods for the optional entries are based on the supplied readable community references and are labeled conservatively where those pages rely on screenshots or carry Steam warning banners.

Efficient 100% Cleanup Route#

If you want all achievements without turning a first playthrough into a checklist, use two passes.

Pass 1: story and easy environmental triggers

1. Play Chapters 1, 2, and 3 naturally.
2. In Chapter 1, take one void fall, wait in the suspicious pool, and stop for the giant encounter. Do not grind ten falls yet unless you want to.
3. Finish Chapter 2 without forcing a Familiar Place hunt; the verified three-room landmark is in Chapter 3.
4. In expanded Chapter 3, enter all three red kindergarten rooms and use each slide you encounter.
5. Play Chapter 5 when it unlocks, then finish Chapter 4 as the final destination.

Pass 2: targeted repetition and hidden rooms

1. Use chapter selection rather than replaying the entire game.
2. Return to a safe Chapter 1 void and complete ten falls for Not Afraid of the Void.
3. Return to the expansion and use one repeatable slide until the ten-ride achievement appears.
4. In Chapter 5, search the red-and-blue grid for Up Down with the main-hall sixth-left-door landmark.
5. Still in Chapter 5, search the first white-door area for the gallery, then use the main hallway to reach the long-window childhood room.
6. Compare the Steam achievement list against your library before starting another full run. The five chapter-completion entries should already be done.

Common Problems and Fixes#

Verified Full Walkthrough Video#

The embedded run is useful when a repeated corridor is impossible to describe in text. YouTube oEmbed verified the title as Liminalcore – Full Game Walkthrough (No Commentary) [4K] and the author/channel as iStudioGamer. The reference identifies the chapter sequence as 1, 2, 3, 5, 4.

Frequently Asked Questions#

Does Liminalcore have combat?

The official mechanics description emphasizes rare entities, atmosphere, and exploration rather than battling monsters. When the game becomes threatening, the expected response is usually to move, observe, or follow the environment.

Is Chapter 5 after Chapter 3?

Yes for unlocking: the developers explicitly state that Chapter 5 unlocks after Chapter 3. For the story-oriented route used here, play 1, 2, 3, 5, then 4.

Can I unlock every chapter without replaying Chapter 3?

Current versions include an Unlock All Chapters option added by the developers for returning players. It is the cleanest solution when an older save does not expose Chapter 5.

Are there 15 achievements?

Yes. Steam app data and the public global-achievements page both show 15. Five are chapter completions; the remaining ten involve voids, water, scale, familiar rooms, slides, and hidden spaces.

Is Up Down fully verified?

The achievement name, description, and existence are verified through Steam. The exact hallway route comes from a readable community guide that Steam marks removed/incompatible, so this article presents it as a cautious location pattern rather than a guaranteed door number.

Sources and Credits#

Official game metadata, update notes, achievement names, and screenshots were checked through Liminalcore on Steam and developer announcements. Hidden-room details were cross-checked against readable community guide references. Video walkthrough by iStudioGamer; no third-party guide images are republished.