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Thunder Birds

Send your wins flying sky-high in this collapsing, cluster-pays slot.

Spark 4 wins to charge a type of bird symbol, building and expanding Power Zones wherever that bird appears on the reels.

If that symbol appears inside a zone, every bird in the zone transforms into it for a surge of wins.

Trigger Free Games for even more excitement where every multiplier symbol boosts wins by up to 100×!

You can play on all your favourite devices!

Free Games

When 4 or more bonus symbols land anywhere on the reels, the Free Games feature is triggered.

More bonus symbols trigger more Free Games.

  • 4 bonus symbols trigger 8 Free Games.
  • 5 bonus symbols trigger 9 Free Games.
  • 6 bonus symbols trigger 10 Free Games.
  • 7 bonus symbols trigger 11 Free Games.
  • 8 or more bonus symbols trigger 12 Free Games.


When the feature starts, the number of Power Zones on the reels reset to 16.

During Free Games, a multiplier symbol can land anywhere on the reels and multiply the win by up to 100x.

The multiplier values that can appear on a multiplier symbol are 2x, 3x, 4x, 5x, 10x, 20x, 25x, 30x, 50x and 100x.