Special Symbols are symbols that each have a unique 'ability' to drive the flow of the game and create dramatic events. If a regular symbol is a 'supporting actor' with only a set payout rate, then a special symbol could be called a 'star lead actor'. They go beyond simply being part of a winning combination, performing various roles that directly intervene in the game's rules, such as substituting for other symbols (Wild), triggering a bonus (Scatter), or filling an entire reel (Stacked Symbol).