Skullapalooza

Reel Expansion is a feature where the physical size of the game grid (reels or rows) actually gets bigger, typically upon entering a bonus round like free spins. This goes beyond simply adding a multiplier; it aims to expand the 'board' of the game itself, providing players with a wider field of opportunity and fundamentally increasing the number of winning ways.

Expanding Paylines is a winning determination system where, typically upon entering a bonus round like free spins, the number of 'Paylines' recognized as a win increases while the physical size of the reels remains the same. Its goal is to increase the winning probability by changing the 'rules' of what constitutes a win to be more favorable to the player, without altering the game's appearance.