. "Hidden building"@en . "A hidden building is a building placed in an unexpected location which would give away a player's tech pattern. It also refers to a defensive structure hidden to contain the opponent before they realize it, such as in a bunker rush or cannon rush."@en . "A hidden building is a building placed in an unexpected location which would give away a player's tech pattern. It also refers to a defensive structure hidden to contain the opponent before they realize it, such as in a bunker rush or cannon rush."@en . .