Concept: This feature transforms the traditional "DLC Unlocker" concept into a narrative-rich gameplay expansion. Instead of simply toggling content on, this mode unlocks a hidden set of schematics found in Ezio’s stronghold at Tiber Island. These schematics allow players to construct and field-test Leonardo da Vinci’s "classified" war machines—early prototypes that were too dangerous or unstable for the standard Borgia guard arsenal. Miss F Mexzoo