The Complete Blue Prince Guide

From your first draft to the final door of Room 46 — walkthroughs, puzzle solutions, and strategy from players who have cleared the mansion.

Start with the Basics

Guides & Walkthroughs

Start Here

Beginner's Guide

Learn the draft mechanic, manage Steps / Gems / Keys / Coins, and survive your first runs without burning resources.

Read the guide
Main Goal

How to Reach Room 46

The full path to Mt. Holly's hidden room — required items, route order, and the mistakes that send you back to bed.

See the route
Puzzles

All Major Puzzles Solved

Boiler Room, Vault, Billiard Room, Parlor, Dartboard, Constellation — every answer in one place.

Open solutions
Strategy

Best Rooms to Draft

Tier-ranked rooms with notes on synergies, when to skip, and which combos guarantee a strong day.

Jump to tier list
Resources

Resource Economy

How Gems generate, why Keys are scarcer than they look, and the room that pays you back twice.

Read more
Endgame

Hidden Rooms & Secrets

Rooms most players never see — the Observatory chain, secret passages, and what's behind the East Wing.

Find them all

Long-tail Guides

Reference

Mansion Map

Visual 9×5 grid layout, East/West Wing, and Mine layers.

See the map
Reference

All Rooms List

Every room in the draft pool — rarity, doors, cost, effect.

Room database
Reference

Items List

Brass Key, Master Key, Crown — every item and where to find it.

Item index
Strategy

Day 1 Strategy

What to do on your first day. Reconnaissance over progress.

Plan day 1
Endgame

All Endings

Standard, Forgotten Wing, and True Ending routes.

See endings
Puzzle

Vault Code 4558

Why DOOR maps to 4558 and where each letter is hidden.

See the derivation

Individual Puzzle Solutions

Puzzle

Boiler Room

Valve order middle → right → left, plus the permanent Mine bonus.

Read solution
Puzzle

Billiard Room

The 3-shot chain combo to clear all 15 balls.

Read solution
Puzzle

Dartboard 180

Three darts at triple-20 and the Marksman's Pin reward.

Read solution
Puzzle

Constellation Chart

Full telescope dial chart for every bedside book.

Read solution
Puzzle

Parlor Riddles

SMOKE, ECHO, PIANO — every Parlor answer + Forgotten Wing.

Read solutions
Strategy

Room Tier List

S to D rankings for every commonly drafted room.

See tier list
Strategy

Resource Economy

Gem-Key-Step-Coin flow and the conversions worth doing.

Read more
Strategy

12 Mistakes to Avoid

The errors that cost runs — and how to recover.

Read more

More Puzzle Solutions

Puzzle

Laboratory — 7 Formulas

The seven stable element mixes for permanent save-file perks.

Read solution
Puzzle

Greenhouse White Iris

Seed order + water sequence for the +1 Gem permanent bloom.

Read solution
Puzzle

Chapel Bell Sequence

Daily plaque rotation + the Day 7 Forgotten Wing hidden sequence.

Read solution
Puzzle

Aquarius Pipes

11-pipe optimal layout for the Wrench item drop.

Read solution
Puzzle

Pump Room PSI

Lever order L-R-M, then 40-60-80 PSI for Mine Layer 3 access.

Read solution

Deep-Dive Guides

Puzzle

Observatory Calibration

Telescope 3-step routine + nightly star table for the Master Star Key.

Read solution
Endgame

Crown of Mt. Holly

Four artifacts, one True Ending. The full forging route.

Read more
Endgame

Forgotten Wing Route

Parlor → Chapel Day 7 → garden door. The second ending in full.

Walkthrough
Reference

Mine Layers 1/2/3

Yield tables, hazards, and the Lantern rule for Layer 3.

Read more
Strategy

Day 2 & 3 Plan

Stabilize Day 2, push the Vault on Day 3 — the two-day micro plan.

Read more

Trending Late-Game Puzzles

Hot

Mora Jai — All 8 Sanctum Boxes

Every Sanctum tile puzzle, corner-color goals, and what each color does.

Read solutions
Hot

A New Clue Anagram

4-book cipher → "TURN SCORCHED SUNDIAL BASE" → 3 microchips → Satellite Dish.

Read solution
Hot

Picture Puzzle — 44 Letters

"Eight dates crack eight safes." Every artwork pair and safe code.

Read solution
Hot

Final Exam — 46 Answers

9-Classroom trigger, 30-min timer, and the Diploma Trophy answer key.

Read solution
Hot

Tomb — 7 Statues Order

Chapel stained-glass numbering for Gardener → Ruler.

Read solution

Advanced Strategy

Strategy

Speedrun Route

Current WR 27:14. Day-by-day route + RNG manipulation.

Speedrun guide
Strategy

Permadeath Survival

One life, seven rules. Iron Heir achievement guide.

Read more
Strategy

Build Playstyles

Coin Rush, Key Rush, Scout, Item Stack — the 4 meta builds.

Pick a build
Reference

All 42 Achievements

Every trigger including 8 hidden achievements.

Achievement list
Reference

Rare Rooms (14)

Drop rates, priority, the 0.4% Sanctum.

Read more
Reference

Shop Rooms (5)

Commissary, Gift Shop, Pawn, Black Market, Apothecary prices.

Read more
Reference

Outer Area

Garden, Apiary, Carriage House — and the hidden Outer Ending.

Outer guide
Reference

FAQ (50+ Q&A)

Gameplay, puzzles, endings, performance — answered.

Browse FAQ

Quick Tips

Always Draft the Pantry Early

Pantry gives Steps back when entered. Place it on a high-traffic path between the Entrance Hall and the East Wing.

Don't Waste Keys on Wooden Doors

Wooden doors unlock by other means. Save Keys for steel doors and chests with gem multipliers.

Read Every Note

Notes left in rooms aren't flavor. Many contain the exact codes you'll need for the Vault and Safe.

The Bedroom Is Optional

Going to bed ends the day — but only triggers when you choose. Don't draft a Bedroom too early or you'll be tempted to quit a strong run.

Track the Constellation

The night sky changes each day. Note the visible stars on day 1 — they're the key to the Observatory puzzle later.

Save the Lab for Mid-Run

The Lab converts items but consumes a turn. Use it when you have a clear conversion target, not as a panic option.

Featured Mansion Map

Mt. Holly mansion floor plan Mt. Holly Floor Plan (9 × 5) Entrance Room 46 Vault West Wing East Wing

Frequently Asked Questions

Is Blue Prince a roguelike? Yes — daily randomized room drafting with knowledge-based meta-progression.
How long to beat Blue Prince? 15–25 hours for Room 46; 30–40 hours for the True Ending.
What is Room 46? The 46th hidden room in Mt. Holly. Reaching it is the main goal.
Is the Vault code the same every run? Yes — 4558, fixed.
How many endings are there? Three: Standard, Forgotten Wing, and True Ending.
Is there a map? 9×5 grid with Entrance fixed at bottom-center. See the visual map.

Recent Updates

May 25, 2026
Five trending late-game guides based on what players actually search for: Mora Jai Sanctum (all 8 boxes), A New Clue anagram, 44-letter Picture Puzzle, Final Exam classroom (46 answers), and Tomb 7-statue order. EN + ZH.
May 25, 2026
Five new deep-dive guides: Observatory puzzle, Crown of Mt. Holly, Forgotten Wing route, Mine Layers reference, and Day 2–3 follow-up strategy. Both EN and ZH.
May 25, 2026
Added 13 long-tail guides: Laboratory, Greenhouse, Chapel, Aquarius, Pump Room, plus Rare Rooms, Shop Rooms, Outer Area, Speedrun, Permadeath, Achievements, Builds, and a 50+ Q&A FAQ.
May 23, 2026
Eight new puzzle and strategy pages: Boiler Room, Billiard Room, Dartboard, Constellation, Parlor riddles, Resource Economy, Room Tier List, and 12 Mistakes to Avoid.
May 14, 2026
Big content expansion: 7 new long-tail guides (Mansion Map, All Rooms, Items, Day 1, Endings, Antechamber, Vault Code). Added 12 SVG diagrams across the site.
May 11, 2026
Added complete Constellation puzzle solution with star map. Updated Room 46 route after recent patch.
May 4, 2026
New beginner guide section on Gem economy. Added best draft openers for solo runs.
Apr 28, 2026
Site launched. All major puzzles documented, six core rooms ranked.