Mount Holly Estate in Blue Prince is a sprawling manor where exploration is key. Although the estate initially maps out 45 rooms, over twice that number can be discovered as players navigate the manor in pursuit of the elusive Room 46.

New rooms are recorded in the Room Directory once drafted, which compiles essential information and may hint at hidden elements or mechanics. Rooms fall into different categories, each offering distinct interactions:

Blueprint Rooms (blue border): Standard spaces with no inherent benefits or penalties.
Bedrooms (purple border): Provide a slight boost by replenishing Steps.
Hallways (orange border): Useful for extending routes within the estate.
Green Rooms (green border): Often exterior spaces that may feature Dig Spots and sometimes require Gems to unlock.
Red Rooms (red border): Frequently carry a cost or disadvantage but can present strategic options.
Shops (yellow border): Allow trading Coins for items or services, with changing inventories.

Rooms are further categorized based on the mechanics they introduce:

Puzzle Rooms offer optional challenges that may yield rewards, with some solvable daily and others only once.
Entry Rooms trigger effects upon each entry, which can be strategically leveraged.
Spread Rooms allow the dispersion of resources to other drafted locations.
Drafting Rooms affect room availability and can alter Draft Pools or re-roll options.
Mechanical Rooms control energy and contraptions that influence related areas.
Tomorrow Rooms activate delayed effects, often influencing the next in-game day.

Expansion Through Drafting

While many rooms are available from the start of each day, additional Blueprints can be collected to expand the Drafting Pool. Certain areas and objectives will only reveal themselves as exploration deepens.

Discovering all 110 unique Blueprints and Floor Plans grants a special in-game achievement: the Explorer’s Trophy.

Directory of Rooms

Blueprint Rooms

These rooms serve as the foundational layout of the estate. They include general utility spaces, puzzle-based rooms, and locations that contain items or crafting opportunities.

Examples:

The Foundation: A permanent room that remains unchanged daily.
Entrance Hall: The starting point of all exploration.
Spare Room, Rotunda, Parlor: Standard or puzzle-based rooms offering various interactions.
Closet, Attic, Storeroom: Dead-end rooms containing resources or items.

Bedrooms

Rooms with a purple border that promote recovery of Steps or deliver specific bonuses tied to rest and personal quarters.

Notable rooms:

Bedroom: Grants Steps on entry.
Nursery: Adds Steps when new Bedrooms are drafted.
Master Bedroom: Rewards Steps proportional to the total number of rooms in the estate.

Hallways

These orange-bordered rooms connect different parts of the estate and are critical in extending paths without reaching dead ends.

Key entries:

Corridor: Always accessible.
Foyer: Ensures hallway doors remain unlocked.
Secret Passage: Leads to a room of a chosen color.

Green Rooms

Representing the gardens and exterior parts of the estate, these rooms are typically green-bordered and often include Dig Spots or garden-themed items.

Highlights:

Terrace: No Gem cost for drafting.
Greenhouse: Increases the odds of drafting Green Rooms.
Morning Room: Provides Gems the following day.

Shops

Marked by yellow borders, Shops let players purchase items with Coins found during exploration. Offerings rotate and vary in usefulness.

Examples:

Commissary, Kitchen: Offer consumables and standard items.
Locksmith: Sells keys.
Bookshop, Showroom: Provide rare or luxury items.

Red Rooms

Identified by red borders, these are high-risk rooms with negative consequences or limitations, though they sometimes offer unique layout advantages.

Examples:

Chapel: Causes loss of Coins when entered.
Archives: Restricts visibility during drafting.
Weight Room: Halves available Steps.

Studio Additions

Unlocked via the Drafting Studio, these rooms are added permanently to the Draft Pool and often feature rare mechanics or hints for solving puzzles.

Examples:

The Kennel: Unlocks all doors in a room upon digging.
Clock Tower: Grants additional Keys the next day.
Casino: Introduces games of chance.

Found Floor Plans

These special rooms are not unlocked through normal drafting but must be found by solving estate puzzles. Once discovered, they become permanent additions.

Notable entries:

Mechanarium: Links to all Mechanical Rooms.
Treasure Trove: Increases Coin rewards with each draft.
Tunnel: Guarantees Tunnel draft availability.

Outer Rooms

Located outside the main estate and only accessible through the West Gate, Outer Rooms provide initial day advantages or resources.

Examples:

Tool Shed: Contains unique items.
Shelter: Shields against Red Room effects.
Trading Post: Allows item exchanges.
Tomb: Accumulates Coins when Dead-End rooms are drafted.

This structured guide allows players to strategically plan their route through the Mount Holly Estate, understanding the importance of each room type and their place in the broader mystery of Room 46.