Abstract: A collapsible shelter assembly is provided. The collapsible shelter assembly is foldable from a compact configuration to an operative configuration for providing a portable yet sturdy shelter, and foldable back to the compact configuration for storage and transportation. The shelter assembly may include a floor system independently connected to a plurality of walls by pivot connecting devices, enabling the plurality of walls to be independently foldable. The floor system has an upper surface defined by periphery edges. A plurality of curbs, each with a different height than the other cubs, are perpendicularly joined along a portion of the peripheral edges, providing different wall-to-curb connection points and thus different pivot points for even identical pivot connecting devices, enabling the pancake stacking of the plurality of walls in the compact configuration.