Build Your Backrooms Buildings & Monsters Catalog

The Catalog Hub is your roster reference for Build Your Backrooms on Roblox. Wind Sun Moon [WSM] describes the loop clearly: build a backrooms maze, place monsters to catch visitors, collect buildings and monsters for more cash, and explore mazes alone or with up to five other players in a six-player server. This section maps that loop to the two unlock families you will spend most of your time chasing.

Navigation labels this category Catalog because the pages track placeable content—not player profiles or leaderboards. Think of it as an in-game collection book translated into wiki form, with cross-links to tier rankings when you want meta advice instead of raw lists.

Two halves of one maze

Collection type	What it does	Wiki page
Monsters	Hunt visitors, earn catch payouts, work offline	Monsters Index
Buildings	Shape routes, create choke points, set maze tone	Buildings Index

Monsters without structure wander in open space. Structure without monsters looks impressive but earns less. Strong accounts balance both collections so every cash purchase reinforces the other.

How collection and cash connect

Official game copy confirms two earnings ideas worth remembering while you browse the catalog:

• Collect cool buildings and strong monsters for more cash — Rarer unlocks generally push your income ceiling higher when placed well.
• Monsters catch people even offline — Your roster keeps working when you close Roblox, so monster investments compound over real-world hours.

Buildings do not catch visitors on their own, but they decide how often monsters get opportunities. That is why catalog pages link outward to Buildings Tier List and Monsters Tier List whenever a piece is strong or weak on paper but depends on layout context.

Using the Monsters Index

The Monsters Index groups hunters by combat role rather than shop row order:

• Corridor hunters — Best on long straight segments where visitors cannot sidestep quickly
• Junction ambushers — Trigger when explorers pick the wrong turn at a fork
• Zone patrollers — Cover wider rooms but need space to path correctly
• Starter catchers — Cheap early picks that remain useful in compact mazes

Each entry notes typical unlock cost bands, offline behavior, and suggested building pairings. When you are ready to optimize spend order, jump to the tier list child page for ranked priorities.

Using the Buildings Index

The Buildings Index organizes placeable pieces by layout function:

• Core hallways — Repeatable segments that define maze length
• Junctions and corners — Decision points that pair with ambush monsters
• Dead ends and trap wings — Punish wrong guesses and extend run time
• Feature rooms — Larger spaces for patrol monsters or visual variety

Building entries call out how each piece affects visitor pathing density—the number of monster encounters per minute of exploration. Higher density usually means higher cash unless visitors quit early from frustration.

Catalog vs tier lists

Question	Start here	Then read
What exists in the game?	Catalog Hub child indexes	—
What should I buy next?	Monsters Tier List or Buildings Tier List	Cash Progress Tips
How do I place unlocks well?	Maze Design Checklist	Getting Started
Did a patch add new items?	Updates Hub	Revisit both indexes

Exploring other players’ mazes

The catalog also helps when you visit someone else’s maze. Spot which building families they favor, note monster roles at choke points, and compare that setup to your own collection gaps. Roblox servers cap at six players, so co-op tours with friends are a fast way to screenshot layouts worth copying ethically—same pieces, your own original path design.

Related wiki sections

• Monsters Index — Role-sorted monster catalog
• Buildings Index — Layout-sorted building catalog
• Tier List Hub — S-through-F rankings for both collections
• Guides Hub — Walkthroughs and mechanic deep dives
• Tools Hub — Checklists and cash planners
• Updates Hub — Patch tracking for new catalog entries

Wind Sun Moon [WSM] can add shop items without a full announcement. Bookmark this hub and the Updates page together so your collection notes stay current through the game’s early live period on Roblox.