Editing Betrayal at House on the Hill (section)

== Creating the Mansion ==
Most of the game's early charm comes from a sort of procedural generation of the haunted house as the players explore it. This early phase of the game is called the Exploration Phase, as the players walk around the unexplored mansion and try to piece together the mystery. There are three stacks of tiles, one for each floor (Ground, Basement, and Upper). All players begin play in the Entrance Hall, which is connected to the Foyer, which is then connected to the Grand Staircase (which leads to the Upper Landing). These are the only three tiles that are always connected to one another in the same location, and they will always be accessible from the start of the game. Every other room is drawn from the appropriate stack of tiles whenever a player goes through a door into an unknown area, leading to a sort of random creation of the haunted house as each player delves further into the treacherous abode.

Each character can move a number of rooms based on their Speed trait value, ''but'' this generally only applies to moving through previously explored rooms. When moving through a door into a new room, that player draws a room tile and places it so that one of the new room's doors connect to the door the player came through. Upon placing down a new room tile the player will usually have to draw a card (which will either be an Event card <nowiki>[the most common]</nowiki>, an Omen or maybe even an Item card) or sometimes follow other specific instructions depending on the room. The events that can happen are usually something bad, such as hearing a scream, or horrifying ghosts appear before you, or something similar and you have to make some sort of Trait roll to see if you endure the situation or crack under the pressure. Either way, the act of drawing a card will make you end your turn, even if you still had moves left according to your Speed, and then it is the next player's turn.