The Stampede Feature can add extra Scatters on any main game spin, offering great chances to win up to 100 initial Free Games. Big Bucks Free Games can be retriggered and can award unlimited amount of free games. Special Purple Scatters which trigger Big Bucks Free Games transform into Locked Wilds during the feature, providing huge potential for big wins. During free games, if a Scatter symbol lands behind a locked Wild symbol, it can still form part of a retrigger.