Fire Opalsby IGT Interactive

Screenshots

There are no pay lines, but 720 ways to win on this 5 reel slot where adjacent symbols make their own paylines. The game pays left to right and right to left. Scatter pays and expanding wilds make phenomenal wins possible. It only takes one bonus symbol anywhere on each of the reels to trigger 10 free spins.

During free spins even more stacks of wilds are added and the free spins can be re-triggered multiple times for up to 260 free games.
The game operates with a separate pay table during free spins as different reels are used with more stacked wilds.