A Splitting Colossal Symbol is a multi-stage feature where a single giant symbol (e.g., 3x3) that appears on the reels, instead of disappearing after contributing to a win, 'splits' into smaller-sized symbols (e.g., two 2x2s) to provide additional winning opportunities. The core of this feature is that the appearance of the colossal symbol is not the end, but that the 'splitting process' itself becomes a core chain reaction event over several stages.