## How the World Dungeon Works
### The Collapse
When the dungeon arrives on a planet, all structures above ground are destroyed. Survivors must enter the dungeon entrance or perish within hours. Those who enter become Crawlers.
### Floors
The dungeon spans 18 floors. Each floor must be completed before descending to the next. Floors increase in difficulty. Certain features unlock at specific floors:
– **Floor 1 (The Entrance):** Basic profile, forum viewing, stats
– **Floor 2 (The Tutorial Guild):** Book 1 Easy Quiz, forum posting
– **Floor 3 (The Overcity):** Race selection, race avatar, Book 1 Medium Quiz
– **Floor 4+ (The Boroughs and beyond):** Advanced quizzes and features
### Crawler Numbers
Every crawler receives a unique registration number upon stepping onto the First Floor.
### Achievements
The dungeon AI awards achievements for notable actions. Some are humorous, others grant powerful bonuses or loot boxes.
### Races
On Floor 3, crawlers may choose a new race from over 40 options drawn from the World Dungeon bestiary, permanently transforming their bodies. Races include Human, Elf, Dwarf, Cat, Skyfowl, Doppelgänger, and many more. Each race comes with a distinctive avatar.
### Classes
Crawlers do not choose a Class. Your Class is assigned as you descend.
### The Tutorial
New crawlers are guided through basic mechanics by their assigned Game Guide and optional tutorial guilds like the Meadow Lark.